Home Travel Stories Gas Logs 1980 CHEVROLET Corvette 350-4 bbl MPG= 11.5 City/ 16.9 Hwy- 12.3 Overall
1980 CHEVROLET Corvette 350-4 bbl MPG= 11.5 City/ 16.9 Hwy- 12.3 Overall PDF Print E-mail
Written by Double Dragon
Friday, 31 December 2010 22:54

1980 CHEVROLET Corvette 350-4 bbl MPG= 11.5 City/ 16.9 Hwy- 12.3 MPG overall

oneownercollectorcar.com

Writing and photography copyright D. S. Brown

80-corvette-gas-guage

Metric= 5.7 L engine- 20.5 L/100km City, 14.7 L/100km Hwy

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1980 CORVETTE MPG WHEN NEW= 14 MPG City/ 20 MPG Hwy (17 MPG Combined)

The EPA rating for the 1980 Corvette 350- 4 barrel lists 14 MPG City and 20 Hwy to produce a combined rating of 17 MPG. The 4 speed manual and 3 speed automatic with lockup converter produce the same figures.

The new EPA system re-rated the 350 at 13 City MPG, 19 Hwy MPG for a combined rating of 16 MPG.

Interestingly, the 305- 4 barrel necessary in California to meet more stringent emissions standards logged worse MPG than the larger 350. The 305 gave only 13 MPG City and identical 20 Hwy for a lower combined total of 16 MPG for the automatic (no four speed manual was available for California). The lockup converter was unavailable in California making this transmission less efficient. A smaller engine has to work harder to get the car moving in stop and go action, too. This has come up several times in these GAS LOGS. See the 1967 Pontiac Beaumont story and the Mercury Turnpike Cruiser in the 1967 Cutlass Supreme Turnpike Cruiser story for detailed stories of big engines getting better MPG than little ones when installed in the same vehicles.

LEMON AID 1981 EDITION says a Corvette with 350-4 barrel engine, automatic transmission and radio weighs around 3,500 pounds. LA estimated MPG to be 12 MPG using unleaded fuel. LA doesn't specify if the MPG is overall average but does say that the MPG quoted is what the car is optimally capable of under ideal conditions.

MOTOR TREND Oct, 1979 tested the new 1980 Corvette but was unable to get their hands on it long enough to produce any MPG figures. CORVETTE MAGAZINE also had a brief stint with a preview car, but no hard technical figures were produced.

Both magazines discussed the shedding of 250 pounds from the 1979 Corvette taking the 1980 curb weight down to 3,519 lbs, which dropped the Vette down two EPA weight categories. The 1980 had thinner window glass and door skins, 20 % lighter Fiberglass T tops, fiberglass bumper and chassis framing, aluminum intake manifold and differential housing.

The weight saving program paid off in a 1 MPG gain in city EPA ratings. The 1979 EPA guide rated the various 1979 Corvette 350 manual or automatic drive train combinations at 13 MPG 'Estimated' which is the 'City' figure. What skews this good news is that somehow the non California bound 1979 Corvette 350 automatic managed 16 MPG 'Estimated' which is higher than the 1980 version.

The lower curb weight of the 1980 was achieved despite a long list of standard luxury equipment: power steering, power four wheel disc brakes, power windows, air conditioning, AM/FM radio, tilt and telescoping steering, dual remote mirrors and anti theft alarm. The car is also loaded with extra niceties such as trip odometer, full instrumentation (speedometer, tachometer, fuel, temp, oil, voltmeter, and clock) supplemented with warning lights for low fuel, generator, seat belt, brake fluid, and carburetor electric choke. The Corvette has telescoping driver sunshade, a retractable screen for the luggage area, vanity mirror in the passenger visor, side cornering lights triggered by the indicators, adjustable delay function on windshield wipers, map pockets in the doors, delay timed interior lights etc.

Below is the OOCC Corvette door sticker. Tire pressure is recommended to be set to 35 PSI for maximum fuel economy. You'll notice that taking 450 Lbs MAX LOAD away from 3891 Lbs GVWR gives 3,441 lbs which differs from the magazine number. Gross Vehicle Weight Rating is the maximum allowable weight possible for the car taking into account all the options installed on that particular car and maximum load. The AMA specs give yet a different weight as discussed further down in the article.

80-corvette-oocc-door-sticker

The Corvette hood was lowered in 1980 in conjunction with now standard front and rear spoilers. The new integral molded in spoilers attached to new front and rear caps. The change from the optional bolt on spoilers of prior years improved aerodynamics. The 1979 co efficient of drag was 0.503. This was knocked down to 0.443 in 1980 which translates to better MPG as well as a faster car.

The new THM350C transmission includes a lockup converter that kicks in at speeds over 30 MPH eliminating energy losses. The 3.36 manual and 3.55 auto rear axle ratios of 1979 were switched to a one size fits all economical 3.07:1 for 1980. The four speed manual shift was given extra low first and second gear ratios to compensate for the lost off the line multiplication caused by the switch to a 3.07 axle.

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OOCC 1980 CHEVROLET CORVETTE CITY MPG= 11.5/ HWY MPG= 16.9

The OOCC Corvette was built Monday June 9, 1980 in St. Louis, Missouri towards the end of the model year. It has all options except L82, four speed manual shifter, trailer towing package and cruise control. It was one of 5,020 Corvettes imported into Canada for the 1980 model year; shipped to the Syd Smith Ltd. car dealership in Kamloops, BC on June 10. To read a history on this dealership which traces its name all the way back to 1915, check out the story in the DEALERSHIPS section of this website.

The first owner registered the OOCC Corvette July 13, 1980. He traded it into the McAuliffe and Sons Auto Ltd car dealership in Kamloops at 2393 East Trans Canada Highway. The dealership specialized in AMC, Jeep and Renault at the time so we can only surmise that the first owner switched his taste in cars quite radically. See the story on this dealership under BC/ KAMLOOPS in the DEALERSHIPS section of this website. The Corvette was sold with 19,200 km (11,780 miles) on Nov 14, 1981. It changed hands quickly, gaining a second owner ten days later. It had a third owner by Aug 25, 1983. The OOCC Corvette was now in Haney, BC and had racked up 63,616 km (39,441 miles) in three years.

As is typical with Corvettes the OOCC Vette amassed a huge list of insurance claims. Owner three had six claims for minor collisions to fix the plastic bumpers after parking lot incidents. Comprehensive and vandalism glass claims as well as three thefts from vehicle claims dogged him. A total theft of vehicle likely soured this owner on the car. The replacement steering column following the total theft is still immaculate which suggests few miles have been added since then. Owner Three listed a mere 90,000 km when he sold the car which is dubious, but not entirely impossible. The Corvette was only registered for the few warm summer months of each of the ten years owner number three had the car.

The mileage since then has been minimal.  The fourth owner had the car for a week from March 29, 1993 until he was able to flip it for a $3,000.00 profit on April 4. The fifth owner kept it for 2 years. The sixth owner bought it July 11, 1995 with mileage registered at 101,000 km. He kept the Corvette unplated during the winter months.

On Jan 8, 1999 the OOCC Corvette was sold with 124,000 km to Showroom Lease Auto Lease and Sales, an upscale specialty dealership on 1570 Main street in North Vancouver, BC. The seventh owner, a female real estate receptionist leased the Corvette until Sep 9, 2000 when the dealer took it back at 152,000 km. Showroom Lease sold it to the eighth owner, a Vancouver, BC area truck driver. He poured copious quantities of money into the mechanicals over the course of 10,000 km before selling to the ninth and current owner. The ninth owner has carried on the tradition of sinking vast amounts of money into the Corvette during his decade of ownership.

The OOCC Corvette original door sticker gives a GVWR of 3,891 Lbs and a maximum load of 450 Lbs (with 2 passengers in the car). Subtracting maximum load from the Gross Weight leaves a curb weight of only 3,441 Lbs.

The 1980 AMA Specifications on the Corvette filed Oct, 1979 and revised in Feb, 1980 claims the base Corvette has a shipping weight of 3,208 pounds (1,455 kg) and a curb weight of 3,336 pounds (1,513 kg). Shipping weight includes all fluids at capacity except gas tank with only 3 gallons. Curb is the same but with a full tank of 24 gallons. Gas weighs 6 lbs per US gallon, explaining the difference between the two figures. Supposedly, shipping weight is routinely low-balled by manufacturers in the interest of savings in freight costs when shipping cars across the country which could explain the contradictory numbers given by different sources.

The OOCC Corvette is factory equipped with weight adding options such as Gymkhana heavy duty suspension, glass T tops, heavy duty 70 amp alternator and heavy duty battery, power door locks, cassette player AM/FM stereo combination, power antenna, quadraphonic speakers, roof panel carrier kit, and rear defogger. This is in addition to the factory standard items that in earlier years of the Corvette were optional such as power steering, A/C etc. The only options not on this car are the L82, cruise control, 4 speed manual and the trailer towing package.

Adding the options on the OOCC swells the weight, but the aluminum wheels shave most of it off again:

Glass Roof panels          6.2 pounds
Heavy Duty Battery        2.2 pounds
Stereo w 8 track           13.0 pounds
Dual rear speakers          2.6 pounds
Power Antenna              2.2 pounds
Gymkhana Suspension  5.3 pounds
Carrier roof panel          15.9 pounds
Auto trans                   24.7 pounds
Aluminum wheels       (-38.8 pounds)
Total added weight       33.3 pounds

Using the AMA Specs the OOCC Corvette weighs 3,369 pounds which disagrees with the door sticker GVWR minus MAX LOAD and the magazine testing figures and brochure weights.

The OOCC Corvette retains factory stock appearance except under hood where it has been taken from a mild performance car to a full on muscle car. The original matching numbers engine block is rebuilt with decked heads, valve work and a performance cam. The carburetor has larger jets, an Edelbrock open element air cleaner with K & N filter on the factory aluminum intake.

The stock exhaust manifolds were replaced with headers. The fake dual exhaust from the factory squeezes two pipes into one pipe choking through a single catalytic converter before releasing it back into dual exhaust. This restrictive factory system was removed and true dual exhaust was substituted exiting through Flowmasters. The Corvette engineers made this easy to do by thoughtfully leaving the holes in the frame intact to allow for Day Two easy mounting of true dual exhaust by enthusiast owners.

The stock THM350C automatic transmission is retained but the lockup doesn't kick in at 30 as it should. The rear stock economy oriented 3.07:1 positraction axle ratio was changed to a performance 3.90:1 posi.

The A/C unit was disconnected at some point which saves energy loss. Weight was reduced via removal of the plastic distributor shield, the ducting work to the original air cleaner, the iron exhaust manifolds and large single catalytic converter. The extra weight of the true dual exhaust is likely compensated for by the weight savings of headers replacing the iron manifolds. Minor weight added to the OOCC Vette comes from a pair of lightweight T- top interior release handle locks and various aftermarket theft prevention electronics.

The OOCC Vette rides on raised white letter stock sized 255R60x15 BF Goodrich radials inflated to factory suggested 35 PSI. The choppy, harsh kidney punching qualities of the Gymkhana suspension eventually caused the PSI setting to be lowered. Even at 32 PSI the car still rides hard enough to retain its' nickname 'The Punisher'.

The OOCC Corvette speedometer and odometer are calibrated in kilometers with a secondary reading in MPH. When checked against mile markers the odometer is exactly accurate. Radar speed displays also confirm the precision of the speedometer. MOTOR TREND Oct 1979 found the speedometer on their test Corvette to be dead correct, too.

The OOCC Corvette odometer reads in kilometers and these figures are reproduced below in the gas logs, but obviously converted to calculate MPG. A general trend of 12 MPG City and 17 MPG Hwy prevails over most of the driving. The exact numbers were worked out by averaging out the sections of City and Highway figures. For instance Highway numbers were 15.3, 16, 17.5, 17.3 and 18.2 which totals 84.3 divided by 5 entries averages out to 16.9 MPG. The overall average of all driving is 2,579.2 gallons to cover 31,961 miles which is 12.3 MPG overall average for all types of driving.

Most of the driving involves 'spirited' driving as one would expect when driving a Corvette.

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OOCC 1980 CHEVROLET CORVETTE CITY MPG= 11.5

The city driving style is pretty aggressive. The OOCC Vette was never used for work commuting and hence avoided the worst gridlock times, maximizing city MPG.

The OOCC Corvette was usually empty or had one passenger when in town. The passenger seat folds flat to allow many boxes to be loaded into the back window area and passenger area. This feature of the car was used frequently to cart several hundred pounds worth of cargo. The gas tank was kept close to full most of the time. The 24 gallon gas tank (23.7 according to owner's manual) adds quite a bit of weight to the car when full. The Corvette was fed 87-94 octane gas depending on how hard it was going to be run. In the areas of the country where Chevron was available this was the first choice of gas.

The first portion of gas logs accrued on city streets and secondary highways when outside temperatures hovered around minus 2 degrees C up to about 7 degrees plus (30 to 40 degrees F). Roads were often wet and some snow was encountered. The car was garaged in a non heated parkade, providing no shortcuts through the cold start phase of use. Tires were set at 35 PSI. The stereo, electric rear defroster, lights, fans and lights were on for most trips. The lights not only drain energy from the engine via the charging system, but the flip up lights create significant wind drag when the car is flying along at 90 MPH.

The overall average for the first section is 99.8 gallons. Discarding the first fill of 13.7 gallons leaves us with 86.1 gallons to cover 1,042 miles (1,677 km). The resulting figure of 12.1 MPG isn't too impressive for open road driving until you consider that the car was driven fast and hard all the time in fairly cold temperatures.

Odometer

Kilometers Gallons      MPG (uncorrected)
68,848      13.7     N.A.
68,880       1.7      N.A.
69,095      14.2      9.6 MPG
69,152       2.8      12.6 MPG
69,193       2.4      10.6 MPG
69,234       1.3      19.5 MPG
69,370       7.4      13.5 MPG
69,444       3        15.2 MPG
69,545       4.6      13.6 MPG
69,579       2.6        8.0 MPG
69,705       7.4      10.5 MPG
69,774       5         8.5 MPG
69,848       4.1      11.1 MPG
70,090       0         N.A.
70,166       3.5       N.A.
70,166       0          N.A.
70,225     15.2      12.5 MPG
70,328       4.9      13.0 MPG
70,525        6       10.5 MPG

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The second section of logs covers winter and spring weather. The same conditions apply as before, except some of the trips were over greater distances and had longer stretches of cruising which probably compensated for the MPG killing cold weather. Many of these trips were leisurely with relaxed cruise speeds of 65-75 MPH. Of course when you are running a 3.90 axle, the word 'relaxed' is relative! 112.9 gallons to cover 1,423 miles (2,295 km) equals 12.6 MPG.

Odometer

Kilometers Gallons   MPG (uncorrected)
70,685      7.7      12.8 MPG
70,800      4.8      14.8 MPG
71,132      3.4      N.A.
71,179      3.6      N.A.
71,242    16.9      16.1 MPG
71,572     1.7       N.A.
71,620     5.4       N.A.
71,680     1.6       N.A.
71,703     1.6       N.A.
71,730     6.0       N.A.
71,820     3.0       N.A.
71,898    15         11.0 MPG
72,146    12.7      12.1 MPG
72,464    14         11.4 MPG
72,498      5.1      N.A.
72,878     15.8      N.A.
72,980       2.3     14.8 MPG

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The third section below represents mostly city driving in warm summer heat. 809 miles (1,304 km) needed 76.4 gallons netting 10.5 MPG.

Odometer

Kilometers Gallons   MPG (uncorrected)
73,300     1.3       N.A.
73,327    17.9      11.1 MPG
73,662     2.6       N.A.
73,680     1.3       N.A.
73,736     1.3       N.A.
73,740     2.6       N.A.
73,785     2.8       N.A.
73,825     2.8       N.A.
73,879     2.7       N.A.
73,919     2.7       N.A.
73,924     2.7       N.A.
74,015     7.6       N.A.
74,058     2.9       N.A.
74,155     6.2       N.A.
74,206     3         N.A.
74,284    16        11.4 MPG

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The fourth section below chronicles some city driving with some stretches of open road. Usually just a driver with some payload and an occasional passenger in weather ranging from 0 to about 60 degrees F. Taking the last fill above at 90,989 as the starting point and the fill below at 92,637 as the end point gives us 113.6 gallons to go 1,022 miles netting 8.9 MPG City.

Odometer

Kilometers  Gallons  MPG (uncorrected)
91,224      1.5    N.A.
91,273      2.4    N.A.
91,289      3.0    N.A.
91,395      2.9    N.A.
91,350      4.4    N.A.
91,464      8.0    N.A.
96,559      4.3    N.A.
91,629    14.5    9.5 MPG
91,667      5.6    N.A.
91,886      9.8   13.8 MPG
91,949     12.7  14.4 MPG
92,189      2.2    N.A.
92,204    14.0     8.7 MPG
92,426     6.2     N.A.
92,474   11.1    15.0 MPG
92,540    4.5      9.0 MPG
92,568    1.8      9.1 MPG
92,637    4.7      9.1 MPG
92,861    2.8     N.A.
92,909    6.1     N.A.

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The fifth section below is a snippet of city driving in spring weather with the usual fast driving explaining the poor mileage. There are no complete fill-ups. A rough figure can be created by assuming the gas tank was kept around the same level. It took 27.3 gallons (not counting the first entry) to travel 342 miles which is 12.5 MPG City.

Odometer

Kilometers  Gallons  MPG (uncorrected)
96,-81       2.4    N.A.
96,848      4.8    N.A.
96,955      4.4    N.A.
97,017      2.2    N.A.
97,056      6.7    N.A.
97,151      7.2    N.A.
97,332      2.0    N.A.

 

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The sixth section below includes 10,124 km (6,277 miles) of city driving with an occasional day trip here and there. There are no fill-ups, meaning only an approximate figure can be reckoned. 521.6 gallons (not counting first 13.7 gallons) equals 12 MPG City, which seems to be a consistent City mileage figure for the Vette.

Odometer

Kilometers  Gallons  MPG (uncorrected)
98,429      13.7   n.a.
98,485        2.0     n.a.
98,582        5.9   n.a.
98,000        0     n.a.
98,851       5.5    n.a.
98,989       5.0      n.a.1
99,052       6.9    n.a.
99,093       9.8    n.a.
99,297       2.5    n.a.
99,413     11.4    n.a.
99,483       0      n.a.
99,667      3.4    n.a.
99,688      4.2    n.a.
99,713      1.1    n.a.
99,742      3.6    n.a.
99,771      2.3    n.a.
99,828      2.4    n.a.
99,911      5.0      n.a.
14            5.2    n.a.
30            5.2    n.a.
203          8.9    n.a.
358          3.5    n.a.
436          7.7    n.a.
628         15.3    n.a.
898         13.8    n.a.
1,100       10.6   n.a.
1,402        2.5    n.a.
1,474        2.4    n.a.
1,493        2.5    n.a.
1,532        2.4    n.a.
1,547        2.4    n.a.
1,613        2.5    n.a.
1,647       15.6    n.a.
1,832        1.1   n.a.
1,972        4.4   n.a.
2,046        2.1   n.a.
2,098        3.1   n.a.
2,146        2.1   n.a.
2,180        4.2   n.a.
2,258        2.1   n.a.
2,298        2.0      n.a.
2,320       4.1    n.a.
2,410       4.0      n.a.
2,432        1.0     n.a.
2,480        2.0     n.a.
2,509        2.0     n.a.
2,000        4.1   n.a.
2,647        0.9   n.a.
2,665        1.9   n.a.
2,690        0.9   n.a.
2,707        1.9   n.a.
2,730        4.1   n.a.
2,818        1.9   n.a.
2,834        1.9   n.a.
2,874        1.9   n.a.
2,903        2.0     n.a.
2,950        3.7   n.a.
3,015        2.7   n.a.
3,055        2.4   n.a.
3,125        1.8   n.a.
3,153        2.7   n.a.
3,177        5.5   n.a.
3,307        5.5   n.a.
3,416        3.3   n.a.
3,504        1.8   n.a.
3,550        3.6   n.a.
3,601        3.6   n.a.
3,690        3.6   n.a.
3,658        1.7   n.a.
3,766        3.7   n.a.
3,828        1.7   n.a.
3,863        3.6   n.a.
3,928        2.7   n.a.
3,690        1.8   n.a.
4,021        1.8   n.a.
4,059        0.9   n.a.
4,090        1.8   n.a.
3.8  n.a.
4,205        3.8   n.a.
4,293        1.9   n.a.
4,313        3.8   n.a.
4,427        3.7   n.a.
4,497        3.7   n.a.
4,560        3.7   n.a.
4,655        1.8   n.a.
4,677        7.6   n.a.
4,815        3.8   n.a.
4,864        5.6   n.a.
4,965        2.5   n.a.
5,084        1.8   n.a.
5,102        1.8   n.a.
5,146        2.8   n.a.
5,198        3.8   n.a.
5,266        5.8   n.a.
5,351        4.0     n.a.
5,448        4.1   n.a.
5,500        4.0      n.a.
5,587        4.2   n.a.
5,654        4.2   n.a.
5,730        4.6   n.a.
5,851        4.2   n.a.
5,927        7.0      n.a.
6,051        5.0      n.a.
6,128        5.4    n.a.
6,221        7.3    n.a.
6,362        6.2    n.a.
6,487        3.0      n.a.
6,524        7.1    n.a.
6,660        1.3    n.a.
6,679        2.8    n.a.
6,718        1.6    n.a.
6,750        1.3    n.a.
6,766        4.1    n.a.
6,867        1.2    n.a.
6,877        2.7    n.a.
6,908        2.7    n.a.
6,980        5.5    n.a.
7,079        3.9    n.a.
7,145        2.6    n.a.
7,194        1.2    n.a.
7,210        1.3    n.a.
7,254        1.3    n.a.
7,264        4.0      n.a.
7,345        3.9    n.a.
7,441        2.6    n.a.
7,469        1.3    n.a.
7,522        2.6    n.a.
7,547        2.6    n.a.
7,620        3.9    n.a.
7,687        2.7    n.a.
7,728        1.2    n.a.
7,756        1.0      n.a.
7,791        1.2    n.a.
7,807        1.2    n.a.
7,839        2.5    n.a.
7,888        2.5    n.a.
7,929        2.5    n.a.
7,982        2.5    n.a.
8,014        2.4    n.a.
8,068        2.4    n.a.
8,129        2.4    n.a.
8,173        2.4    n.a.
8,213        2.4    n.a.
8,258        2.4    n.a.
8,305        2.5    n.a.
8,352        3.4    n.a.
8,406        2.3    n.a.
8,429        2.3    n.a.
8,488        2.4    n.a.
8,553        3.5    n.a.

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Eventually the car was fed nothing but Chevron 94 octane gas which contains no ethanol. Ethanol is harmful to the plastic components in the fuel systems of older cars. Even for 2,380 km (1,476 miles) of lazy city cruising the car got the good 94 gas. The oil was usually 10W30 Quaker State or 10W30 Castroil. Tires were reduced to 32 PSI in a vain attempt to reduce ride harshness.

The seventh section below is a list of City driving with a few fill-ups hovering around 13 MPG, about the same as other City entries above.

Odometer

Kilometers  Gallons  MPG (uncorrected)
23,765       2.4    n.a.
23,765       2.3    n.a.
23,420       5.9    n.a.
24,025       2.3    n.a.
24,050       4.8    n.a.
24,209       4.6    n.a.
24,263       4.4    n.a.
24,326       3.5    n.a.
24,211       3.8    n.a.
24,465       3.8    n.a.
24,519       2.5    n.a.
24,596       4.1    n.a.
24,687       3.6    n.a.
24,760       4.8    n.a.
24,873       2.4    n.a.
24,922       2.4    n.a.
24,984       2.4    n.a.
25,002       2.4    n.a.
25,---        4.7    n.a.
25,200       5.8    n.a.
25,315       4.9    n.a.
25,393       1.9    n.a.
25,416       2.4    n.a.
25,514       2.3    n.a.
25,534       2.9    n.a.
25,613       1.1    n.a.
25,639       1.8    n.a.
25,645       2.0    n.a.
25,710       4.5    n.a.
25,774     13.1    n.a.
25,892      4.6    15.9 MPG
25,994      4.6    13.7 MPG
26,086      2.9    n.a.
26,145      3.9    n.a. 
26,282      4.6    n.a.
26,524      8.7    n.a.
26,735      7.2    n.a.
26,769      8.3    n.a.
26,796      2.5    13.0 MPG 
26,871      3.6    n.a.

29,268      5.6    n.a.

29,338      7.5    n.a.

29,449      4.1    n.a.

29,511.3    1.1   n.a.

29,535       4.4   n.a.

29,597.8.   3.3.  n.a.

29,615.3.   3.3.  n.a.

29,648.     3.4.  n.a.

29,600      1.7.  n.a. (87)

29,719.     1.7.  n.a. (87)

29,820.    15.9. full

29, 894     3.7.  9.0 MPG

30,000.     3.4.  n.a.

30,257.     3.1.  n.a.

30,292     3.4.   n.a.

30,300.    1.7.   n.a.

30,400.     3.4.  n.a.

30,400.     3.4.  n.a.

30,400.     3.4.  n.a.

30,400.     3.5.  n.a.

30,713.     1.8.  n.a.

30,759.    3.4.   n.a.

30,783.    1.7.   n.a.

30,787.    9.0.   n.a.

30,889    9.0.    n.a.

31,019.   2.5.   n.a.

31,063.   4.1.   n.a.

31,100.   4.0.   n.a.

31,188.  6.5.    n,a.

31,248.  3.3.    n.a.

31,299. 6.6.     n.a.

31,449. 3.3.     n.a.

31,480  8.7.     n.a.

31,589  8.9.   F-

31,835. 3.2.   n.a.

31,854.0  14. F+

The individual city MPG segments of 12.1, 12.6, 10.5, 8.9,

////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////

OOCC 1980 CHEVROLET CORVETTE HIGHWAY MPG=16.9

On road trips the Corvette was laden with quite a bit of luggage and food. The passenger seat folds flat to allow many boxes to be loaded into the back window area and passenger area. The gas tank was kept close to full most of the time. The 24 gallon gas tank (23.7 according to owner's manual) adds quite a bit of weight to the car when full.

The Corvette was fed 87 to 94 octane gas depending on how hard it was going to be run. In the areas of the country where Chevron was available this was the first choice of gas. Frequently the car was run with the T tops off causing wind turbulence which adversely affects co efficient of drag and hence lowers MPG.

----------------------------------------------------------------------------------------------------------------------

HIGHWAY TRIP ONE- 15.3 MPG (2,073 miles)

The road trip mileage below is almost all highway driving. A warm summer of day trips or weekend jaunts roaming around mainly on secondary highways discovering small towns is lumped into one trip for summary purposes. The trips included some bursts of hard driving on twisty back roads but primarily laid back highway cruising at 60 to 80 MPH. 2,073 easy miles used 135.1 gallons since the last fill listed at 74,284 km.

Odometer

Kilometers   Gallons  MPG (uncorrected)
74,444       7.2     13.8 MPG
74,779       2.6      N.A.
74,832       6.2      N.A.
74,980       4.5      N.A.
75,039      13.9     13.1 MPG
75,136       3.3      18.2 MPG
75,339       8.4      14.8 MPG
75,437       2.7      22.2 MPG
75,858      15.2     17.2 MPG
76,040       7.3      15.4 MPG
76,119       2.1      23.2 MPG
76,246       6.4      17.0 MPG
76,448       8.8      14.2 MPG
76,697       9         17.0 MPG
76,907       5.9      22.0 MPG
76,944       2.4       9.4 MPG
77,270      12.2       N.A.
77,595      14.1     15.4 MPG
77,627       2.9       6.8 MPG

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HIGHWAY TRIP TWO= 16 MPG (8,212 miles)

Below is a summary of a 13,245 KM winter road trip, mainly Interstate cruising. These 8,212 miles were primarily steady 65 to 90 MPH cruising with only a moderate amount of stop and go city exploration and some secondary highway driving. There were stretches run at 120-130 MPH on empty highways in Arizona and Texas. The car was loaded down with food and supplies. Added to driver weight the payload was about 300 pounds. Tires were set to 35 PSI. Windows were up, T tops installed. Temperatures were as low as 0 degrees F, and no higher than 70 degrees F. 513.1 gallons (not counting first fill of 6 gallons) to travel 8,212 miles averages out to 16 MPG Hwy.

Odometer

Kilometers Gallons  MPG (uncorrected)
77,744      6        12.0 MPG
78,039    13.2      13.8 MPG
78,096     3.5       10.0 MPG
78,355    10.7      15.0 MPG
78,551      7.7      15.7 MPG
79,086      2         N.A.
79,109     17.4     17.8 MPG
79,591     14.8     20.1 MPG
79,925     13.7     14.3 MPG
80,278     11.9     18.3 MPG
80,389      4.1     16.7 MPG
80,747     13.3     16.7 MPG
81,057     10.7     17.9 MPG
81,318      8.4     19.2 MPG
81,684     13.1     17.3 MPG
81,881      8.9     13.7 MPG
82,268     10.4     23.0 MPG
82,522      7.6     20.7 MPG
82,728      8        15.8 MPG
82,800      2.5     17.8 MPG
83,035      9.7     15.0 MPG
83,403     13.9     16.8 MPG
83,621      9.2     14.7 MPG
84,365     16.7     N.A.
84,564     13.2     9.3 MPG
84,746      9.3     12.1 MPG
84,889      4.9     18.1 MPG
85,125      1.8     N.A.
85,125     10.4     N.A.
85,517     16.5    14.7 MPG
85,949     16.1    16.6 MPG
86,296     15.9    13.5 MPG
86,725     16.4    16.2 MPG
87,144     17.2    15.1 MPG
87,503     16.9    13.1 MPG
87,901     16.1    15.0 MPG
88,320     17      15.2 MPG
88,772     19.9    14.0 MPG
89,062      8.2     N.A.
89,386      8.6     N.A
89,598     18.4   14.8 MPG
89,945     16.2   18.4 MPG
90,249     11.6   16.1 MPG
90,639     15.6   15.4 MPG
90,989     14.5   14.9 MPG

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HIGHWAY TRIP THREE= 17.5 MPG (2,188 miles)

Below are fill-ups for a 3,529 km (2,188 miles) road trip that ran from 92,995 to 96,612 km in winter through blizzards in mountain tops ending in a decent warm climate. The middle thousand miles of driving happened on secondary highways exploring small towns. The rest was Interstate cruising at 70-75 MPH, except for the portions where snow and ice held speeds down around 30 to 50 MPH. The OOCC Corvette had two passengers plus luggage for a total of 500 pounds. Tires were set at 35 PSI. 141.2 gallons minus first fill 16.6 equals 124.6 gallons to travel 2,188 miles which is 17.5 MPG Highway overall average.

Odometer

Kilometers  Gallons  MPG (uncorrected)
92,995      16.6   N.A.
93,468      17.6   16.7 MPG
93,876      15.3   16.5 MPG
94,321      16.8   16.4 MPG
94,663       8.3    N.A.
94,974      15.6   17.0 MPG
95,400      15.3   17.2 MPG
95,942      18.2   18.0 MPG
96,450      15.7   20.0 MPG
96,524       1.8   24.0 MPG

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HIGHWAY TRIP FOUR= 17.3 MPG (568 miles)

The figures below combine a few short trips using mainly secondary highways from 97,324 km to 98,042 km. The second short trip ends at 98,320. These summer trips consisted of quick driving on winding hilly terrain and frequent stops in small towns. The Corvette had 2 passengers and enough luggage to account for about 450 pounds. Average speeds were around 65 MPH. Tires were inflated to 35 PSI. Starting at last fill-up of 97,332 the distance is 586 miles using 25 gallons (not counting first entry). With no complete fill-ups the number runs 23.4 MPG which is unlikely. A more likely figure is about 17.3 MPG which is the only fill up calculated number available.

Odometer

Kilometers  Gallons   MPG (uncorrected)
97,380       16.1  N.A.
97,809       15.3  17.3 MPG
97,992        3.6   N.A.
98,277        6.1   N.A.

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HIGHWAY TRIP FIVE= 18.2 MPG (9,383 miles)

The entries below are from a road trip covering 8,600 to 23,700 km. The 15,100 km road trip covered Interstates in hot summer weather with cruise speeds varying from 65 to 90 MPH depending on traffic. A lot of exploring on secondary highways and city streets included in these figures doesn't take down the average noticeably. The majority of the driving was Interstate. 513.8 gallons (not counting the first 2.2 gallon entry) to cover 15,054 km (9,354 miles) means an average of 18.2 MPG Hwy.

Odometer

Kilometers  Gallons  MPG (uncorrected)
8,603         2.2    N.A.
8,634         2.4    N.A.
8,721        15.7   N.A.
9,152        13.4   19.9 MPG
9,---            3.6   N.A.
9,713          3.1   N.A.
9,790         15.0  18.2 MPG
10,225       15.5  17.4 MPG
10,711       16.9  17.8 MPG
11,190       16.1  18.4 MPG
11,613       13.9  18.8 MPG
12,106       13.3  22.9 MPG
12,412        3.5   N.A.
12,586      15.2   15.9 MPG
12,796        8.0   16.2 MPG
13,101      12.6   15.0 MPG
13,642      15.8   21.2 MPG
14,022      12.6   18.6 MPG
14,405      12.4   19.1 MPG
14,552       4.4    N.A.
14,759       8.7   16.7 MPG
15,122      13.5  16.6 MPG
15,594      14.5  20.1 MPG
1-,---         4.8   N.A.
16,015      15.6  12.7 MPG
16,418      14.0   17.8 MPG
16,785      13.2  17.2 MPG
17,346      16.1  21.6 MPG
17,750      12.5  20.0 MPG
18,255      17.0  18.4 MPG
18,648      13.0  18.7 MPG
19,135      13.8  21.8 MPG
19,518       0.4   N.A.
19,587       5.7   N.A.
19,691     14.1   17.0 MPG
20,128     11.4   23.7 MPG
20,583      7.1   N.A.
20,653     11.9  17.1 MPG
21,124       3.5  N.A.
21,227      14.0  20.3 MPG
21,538       7.9  24.4 MPG
21,870     11.9  17.2 MPG
22,276      1.3   N.A.
22,276      9.0   24.4 MPG
22,671    16.1   15.2 MPG
23,153    15.2   19.6 MPG
23,559    13.1   19.2 MPG
23,657      1.1   N.A.

oocc-dragon-end

 

 

 

 

 

 

St. Louis, MO Noon

SU 19 GE/ MO 6 TA/ ME 12 CN/ VE 27 GE/ MA 14 GE/ JU 3 VI/ SA 20 VI/ UR 22 SC/ NE 21 SG/ PL 19 LI/ NN 22 LE

SU sq SA/ SU 180 NE/ SU tr PL/ ME sx MA/ VE bq UR/ JU 45 PL/ SA sx UR/ SA sq NE/ SA 30 PL/ UR 30 NE/ NE sx PL

 

Last Updated ( Tuesday, 17 March 2020 22:10 )