Home Travel Stories Gas Logs 1967 OLDSMOBILE 4-4-2 400-4 bbl MPG= 11 City/ 15 Hwy.
1967 OLDSMOBILE 4-4-2 400-4 bbl MPG= 11 City/ 15 Hwy. PDF Print E-mail
Written by Double Dragon
Thursday, 21 October 2010 21:44

1967 OLDSMOBILE 4-4-2 400-4 bbl MPG= 11 City/ 13.2 Hwy.


Writing and photography copyright D. S. Brown, images from Rocket Circle magazine copyright Oldsmobile, owner's manual images copyright Oldsmobile.

67 oldsmobile 442 red bob logo

400-4 bbl MPG= 11 City/ 13.2 Hwy.

Metric = 6.6 L engine- 21.3 L/100km City, 17.8 L/100km Hwy

67 oldsmobile 442 bob red gas gauge

General Motors released a line of compact cars in 1961 internally code named 'A bodies'. Pontiac Tempest, Oldsmobile F85, and Buick Special started with the basic structure originally used to create the Chevrolet Corvair. For the 1964 model year GM enlarged the A bodies to become intermediate sized cars. Chevrolet created the Chevelle to inhabit the A body intermediate spot while leaving their compact Corvair unaltered. The rest of the divisions shuffled the names assigned to compacts onto the new intermediate platform.

The A body 1964 Oldsmobile was available in base F85 trim, and upscale Cutlass format. Starting in 1964 Oldsmobile offered a special F85 or Cutlass option named 4-4-2. The 4-4-2 was an Oldsmobile version of the wildly popular Pontiac Tempest GTO.

The Pontiac GTO was an exciting option on the Pontiac 'A body' Tempest combining a relatively light car with a big engine and performance imagery. The GTO was instantly recognizable. Unlike Chrysler's extremely potent performance products of the time which were basically invisible on the street, the GTO package came complete with racy appearance and tons of 'youth image'.

Pontiac was ahead of the curve with their marketing and imagery, and enjoyed an engineering short cut that other GM divisions lacked. Pontiac used the existing engine mounts and accessories when replacing the Tempest 326 cubic inch engine with the GTO 389 cubic inch engine. Both engines share the same external dimensions.

Chevrolet SS and Oldsmobile 4-4-2 answered the GTO in 1964 with quickly cobbled together copycats that relied on small blocks and thus fell short of the GTO 389. The first of the GM divisions to copy the GTO was Oldsmobile using a police spec small block 330 engine with 4 barrel carburetor, 4 speed manual transmission and dual exhaust. The name 4-4-2 meant 4 barrel, 4 speed, 2 exhaust in 1964.

Oldsmobile kept the 4-4-2 name for 1965 despite making a 3 speed manual shift and an automatic transmission available. The 4-4-2 now had its own big block 400 engine allowing the moniker to be revised to mean 400 (4), 4 barrel (4), dual exhaust (2). When the triple 2 barrel carburetor option appeared Oldsmobile just didn't bother to explain why the cars with optional engines weren't named '6-4-2'! Guys without 4 speeds would technically own a '4-2-2' or 4-3-2'!

Buick didn't respond to the GTO until 1965 when they found a way to get a 401 to fit into the Special and named it GS (Gran Sport). Chevrolet previewed an expensive low production Chevelle 396 SS in late 1965 but didn't offer an affordable volume version of a big block until 1966.

Pontiac GTO had the image and beat everyone in the scramble to install big engines. Despite Pontiac being the originator, Oldsmobile made their 4-4-2 musclecar special by concentrating instead on tweaking the handling. The 4-4-2 was praised as one of the best all around muscle cars offered during the 1960s due to excellence in all areas of performance: straight line speed, handling and braking.

67 oldsmobile 442 bob red hurst shifter

Following Pontiac's lead, Olds made Hurst shifters standard in all floor shifted 4-4-2s. Oldsmobile actually embossed the shifter arm on both sides with the 4-4-2 name. Olds also got on board quickly with the switch to Muncie transmissions in 1965. By 1966 Olds responded to the GTO Tri-Power monsters by offering a potent 4-4-2 drag strip car with force air tri- carburetors named W-30. In 1967 the GM tri- carburetor ban (Corvette was exempt) caused the W-30 to run with a 4 barrel, but it picked up red plastic inner fender liners for weight savings and eye appeal.

Some people believe that a true musclecar should be a 4 speed. The 4-4-2 heightened this perception since the first year definition of the 4-4-2 name referenced the fact it was solely available with a 4 speed floor shifted manual transmission. Despite this ingrained belief about 4-4-2s needing to be 4 speed cars the TH400 automatic transmission changed everything for 1967.

Oldsmobile's history of selling more manual shift 4-4-2s than automatics was changed when the excellent GM 3 speed automatic became available for 1967. A wave of converts to automatic shifting also had a choice of a Hurst 'His/Hers' dual gate console shifter for automatic cars which sweetened the appeal of an automatic transmission. 12,528 of the 1967 4-4-2s were automatics. 11,381 were 4 speeds and 918 were manual shift 3 speeds.

The most commonly encountered 4-4-2 in the 1967 model year was equipped with an automatic transmission running through a 3.08 axle. This typical 'mild' 4-4-2 produced approximately 11 mpg City and 15 mpg Hwy. The 4-4-2 enjoyed increasing popularity in its fourth year after its obscure beginning in 1964. Another refinement introduced in 1967 was the lack of purchaser choice of body platform. All 4-4-2s were now built starting on the high end Cutlass Supreme body.

Below you can see a Spanish Red and a black 4-4-2 on page 34 of the 1967 Oldsmobile sales brochure. Both the Red and Black cars have full length body chrome accents that run along the base of the rockers and join wheelwell lip mouldings. The base Cutlass lacks this extra chrome.

Note the back end of the Gold 4-4-2 also shown below. The top and bottom red lens lights indicate that this is a Supreme which has cutouts in the rear bumper for white reverse lights along the license plate. The base Cutlass model lacks these cutouts and simply used white lenses on the bottom tail light for the reverse lights.

67 442 page 34 oldsmobile brochure

Below are pages from the Oldsmobile Rocket Circle magazine showing a White 4-4-2, a Spanish Red 4-4-2, and the back of a gold 4-4-2. The red pinstripe is clearly visible on the white car (it is also present on the black car shown above but harder to see in the image). The 4-4-2 emulated the GTO which came with thin pinstripes from the very start. For 1967 the 4-4-2 stripe faded out behind the driver's door.

The image of the white car also clearly shows the different hood used on the 1967 4-4-2. The Cutlass hood had a chrome strip running down the middle of the hood. This strip was deleted on the 4-4-2 and louvers were added to the hood.



Aside from the extra chassis engineering devoted to creating a good handling car and the heavier drive train on a 4-4-2 versus the plain Cutlass the 4-4-2 gains weight from the heavy duty propeller shaft, and heavy duty frame. The automatic 4-4-2s received the three speed Turbo-Hydro-Matic automatic transmission which weighs more than the two speed Jetaway which was the top automatic transmission available in a Cutlass. Only two Cutlass models in 1967 aside from the 4-4-2 were able to receive a TH400: Turnpike Cruiser and Custom Vista Cruiser. The 4-4-2s bigger high performance engine and higher rear axle ratio all return lower mpg than a lighter, milder Cutlass.


MPG of 1967 4-4-2 when first released.

When Motor Trend tested the Turnpike Cruiser in February, 1967 they simultaneously ran a 4-4-2 with TH 3 speed Auto and 3.08 axle. They garnered 13.3 MPG Highway at a steady 70 mph for the 4-4-2.

Car & Driver December 1966 tested a 4-4-2 with 400, TH 3 speed auto and 3.08 axle. The mileage ranged from "11 to 17 MPG". This probably means that the City was the lower and Hwy the higher figure, but it's not specified.

Road Test got 11.6 MPG overall during a hard driving test of a 4-4-2 with 400, TH 3 speed auto, and unspecified axle (likely the standard 3.08 that was coupled to the automatic 4-4-2s). The car was a convertible, which adds weight while the less aerodynamic shape hurts MPG.

PERFORMANCE CARS Magazine ran a super tuned 4-4-2 with the 400, 4 speed manual and 3.90 axle. Not surprisingly, given the rear axle, the reported MPG was '8-12' over 1,000 miles.

High Performance CARS October, 1967 tested a W-30 4-4-2 with cold air induction 400, 4 speed and 4.33 axle. Just like the PERFORMANCE CARS Magazine test, they saw "8-12 MPG".

The April, 1967 Popular Mechanics Owners Report tabulated the results for Cutlass drivers with the 400 4 barrel carburetor and the Turbo-Hydro-Matic 3 speed auto: 11.9 MPG City and 14.7 Highway. The 400 engine Cutlass is listed without reference to what proportion were 4-4-2s or Turnpike Cruisers. The 4-4-2 was more popular, so we may assume that the majority were 4-4-2s with the automatic, standard 3.08 axle and regular 7.75 x 14 inch tires.

Below is a page from the 1967 Cutlass owner's manual listing tire specifications for the Cutlass and 4-4-2 models.


Many of the test cars given to the magazines came with the optional 4-4-2 exclusive F70 x 14 tires with a lower profile and hence different diameter. The smaller diameter tire turns more often than the taller tire forcing the engine to turn faster and use more gas. See the article at the start of this GAS LOGS section called Calculating MPG for more on tires and MPG.

The 4-4-2 offset the 'short tire' disadvantage to some degree because the recommended inflation was an easier rolling 26 PSI front and rear versus the regular Cutlass which used gas robbing low inflation rates of 24 PSI.


OOCC 1967 Oldsmobile 4-4-2 CAR HISTORY

67 oldsmobile 442 red bob front

This Spanish Red 1967 Oldsmobile 4-4-2 VIN 338177M216558 is a Cutlass Supreme built in the Lansing, Michigan final assembly plant. All 1967 4-4-2s were built using the Cutlass Supreme 2 door body shell as a starting point. In 1968 the 4-4-2 became its own model series.

The Cutlass Supreme first appeared in 1966 as a four door hardtop and was so well received that Oldsmobile decided to make the Supreme model available in various bodystyles for 1967. In 1967 Supremes were available as 2 and 4 doors as well as convertibles. Aside from a standard stronger version of the 330 engine using high compression and a 4 barrel carburetor rated at 320 horsepower the Supreme models included plusher interiors and more chrome accent trim on the body.

The 4-4-2 option was available on the Supreme 2 door post and hardtop and the convertible. The heart of the 4-4-2 option was the 400-4 barrel engine. The standard manual transmission was either 3 or 4 speed which seems strange since the 4-4-2 name originally inferred a 4 speed. Customers could also order a TH400 if an automatic transmission was preferred. The 4-4-2 option included 4-4-2 badges, louvered hood, blacked out front grille, front and rear sway bars and heavy duty components such as engine mounts, propeller shaft etc.

67 oldsmobile 442 red bob driver front

The OOCC Spanish Red 4-4-2 is a factory 4 speed car with power front disc brakes, AM radio, and rare Tilt-Away steering wheel. In the image below the tilt control is the one closest to the dashboard.

67 oldsmobile 442 bob red Tilt Away Steering

Other options include Soft Ray tinted windshield, Deluxe front and rear seatbelts, Sports console, and black vinyl roof. This 4-4-2 came without power steering, A/C or rear defroster as it was obviously intended to be a lightweight performance machine.

67 oldsmobile 442 red bob cowl tag

The cowl tag decodes as follows:

12D= built in the 4th week of December, 1966.

ST67= 1967 Model year. 33817= Cutlass Supreme. LAN11369= Lansing factory number.

TR 975-B= Red bucket seats. R2 PAINT= Spanish Red lower paint/ Black vinyl top.

W= Soft Ray Windshield only.  2L= 2 means column '2', L is Cut out for 4 Speed transmission.

5V= 5 means column '5', V is 4-4-2 option

The OOCC 4-4-2 was street driven for a short period before the car was turned into a race car using a built 455. After 3 years as a quarter miler the 4-4-2 sat unused for years.

67 oldsmobile 442 red bob d side

In March, 2000 the 4-4-2 was purchased by its second owner, Mark. The 4-4-2 had 21,521 original miles and was a very straight rust free car. Mark was an Oldsmobile Club and 4-4-2 Club member from Kenmore, Washington. Mark was around 55 years old and already had two Chevelle SS 4 speeds in his collection. Mark had owned a similar 4-4-2 when younger which prompted him to seek out another 4-4-2.

67 oldsmobile 442 red bob super stock redline

Mark's first order of business following purchase of the 4-4-2 was to switch to 15 inch Super Stock reproduction factory style mags on April 8, 2000. On April 13, 2000 Les Schwab Tires in Kenmore mounted 4 new Grand Am 235/60 raised white letter tires. A subsequent owner switched the tires to a set of redline radial tires that approximate the look of the original 1960s tires. Compare the tires above to the photo of the Spanish Red 4-4-2 in the Oldsmobile Rocket Circle magazine further up in this article.

In Dec, 2000 Mark bought a 'Day Two' period correct aftermarket Stewart Warner under dash ammeter, temp gauge and oil pressure gauges set in a chrome mounting panel. Another deviation but within the era of the car was the use of a factory tachometer from model year 1965 mounted on the top of the console.

67 oldsmobile 442 bob red dash

The Pontiac GTO was the only GM musclecar to get the gauges right. Other GM musclecars jammed mini tachs in where they could be fit or put them in strange spots that were not visible.

The factory placement of the tachometer for the 1967 4-4-2 mounted to the right of the speedometer as part of the Rocket Rally Pac also known as the 'Tic Toc Tach'. The right hand pod that normally housed idiot lights for temp, oil and generator as seen below could be optionally filled up with clock, tach and real gauges all clumped into a kaleidoscopic mess that made power shifting tricky. Most street racers mounted a tach on the steering column. Mark's solution places the tach on the console which was the factory spot used for optional tachs on 1964 and 1965 44-2-s.

When I drove this car I shifted according to engine sound. When hurtling down a country road hitting the gears and going north of triple digit speeds you want to keep your eyes on the road. On a second run my co pilot read the tachometer out loud for me. I have driven a 1966 Olds 4-4-2 at speed and the factory tachometer placement to the far left of the dashboard made it possible to read it while driving. The location wasn't ideal but it was possible to flick my eyes over to the tach without losing track of the road in front.

Below you can see that this 1967 4-4-2 uses the stock gauge configuration of speedometer, odometer and fuel gauge. The pod to the right could be optionally ordered with the 'Tic Toch Tach'. Sharp eyed readers will see the square cutout frame between the bottom of the two pods in the black background trim. This square is punched out and used as the shift quadrant indicator in cars that came with an automatic transmission. On manual shift cars that part of the dashboard is left intact with the filler blocking plate.

67 oldsmobile 442 bob red speedometer and gauge

Mark paid a shop to rebuild the transmission Jan 4, 2001 and removed the dragstrip 4.11:1 gears. He installed 3.55:1 gears and wide ratio Hurst shifter. Things were still not exactly right with the transmission prompting Mark to purchase a clutch kit, grommet and loom on Dec 26, 2001.

Mark reinstalled the original engine with a 0.030 over rebuild bringing total cubes up to 406 c.i. He installed a street friendly 272 duration and 501 lift Comp Cam. The engine was assembled, machined and balanced by Keller Motor Supply in Medford, Oregon in May, 2001. A re manufactured water pump was also installed at this time.

67 oldsmobile 442 bob red 400 passenger view

Although incorrect chrome was added to the underhood area (original fan, fan shroud, alternator, and heater box) and the firewall was filled and smoothed over the 4-4-2 otherwise retains the factory correct intake, carburetor and exhaust manifolds.

New disc brake rotors were added to the car and Gabriel coil over rear shocks. Mark purchased engine and transmission mounts along with bronze engine paint and rad hoses, and thermostat in October, 2001. He purchased a PCV valve at the end of Dec, 2001 which suggests the drivetrain made it back into the car before 2002. The spark plugs and distributor cap were all factory correct over the counter pieces. A new hood blanket was also ordered and the rebuilt radiator was reinstalled in Jan, 2002.

67 oldsmoboile 442 bob red interior

A new fuel tank sending unit was installed along with new fuel line and fuel pump provided by Supercars Unlimited. Other items replaced include the antenna, ashtray bulb, brake booster check valve, calipers, parking cable, valve cover vent tube, forward lamp harness, chrome water neck, and PCV hose to block. Year One reproduction pedal pads and chrome trim, horns, and open element air cleaner were also purchased.

Minor changes from stock include 'Day Two' underdash Stewart Warner gauges, black Oldsmobile seatbelts instead of color coded red belts, and 15 inch wheels instead of stock 14s. In January, 2004 Mark was still tinkering with the car as evidenced by his purchase of a carburetor base gasket.

Mark sold the 4-4-2 to the third owners; a couple from New Jersey named Chris and Diane. They had the 4-4-2 shipped to their home in East Hanover, NJ sometime after contacting Kanter Auto Transport March 17, 2004.

The rebuilt engine had a claimed 600 miles on it but the odometer shows Mark actually did less driving than that. The odometer was showing 21,721 miles on a May, 2004 garage bill which is exactly 200 more miles than the car registered back in 2000 when owner number two Mark first bought the car. That is a mere 50 miles a year!

67 oldsmobile 442 bob red radio

The new owners ordered a Coker Tire reproduction Super Stock 15" x 7" wheel for the spare. In April, 2004 a vintage style modern radio was mounted in the original dash holes. The original radio was kept with the car. Soon after the radio was installed the new owners encountered problems with the battery going dead. In May, 2004 a GM dealership replaced the battery and voltage regulator.

In April, 2004 a new power brake booster unit was installed. A new master cylinder was installed in June, 2004 plus lines. In October, 2004 a rear brake hose was replaced. It seems a phantom brake issue was rearing its head now. Back in 2002 Owner Two Mark had replaced the master cylinder so this points to perhaps a sticking caliper or incorrectly routed brake line that was burning the fluid rather than a faulty master or leaky lines. This seems to be supported when in April, 2007 new 4 piston calipers were installed and a line was moved away from an exhaust manifold in 2015.

The carburetor was rebuilt. An August 2004 bill from NAPA in Washington, NJ for carburetor pull off and a V belt plus another bill for stant caps and gaskets indicate that some tinkering was still going on. The alternator was also replaced. Little details were addressed such as a new windshield washer bottle and lines as well as a reproduction trunk mat. At the end of the year anti hop bars were installed. New seat foam and springs were ordered from Year One.

67 oldsmobile 442 red bob passenger rear

In 2005 the tachometer was repaired by a specialty shop. When the rear pinion seal in the axle was replaced at a local GM dealer in July, 2005 the odometer read 25,181 miles.

Summer of 2006 a single coil spring and a right rear spring insulation pad was bought. Bits and bobs were accumulated such as 6 reproduction seat chrome end caps and a clutch spring set.

The couple relocated to Lake Como, PA in October, 2006 and took the 4-4-2 along with them. Oct 6, 2006 four new coil springs were installed with the 4-4-2 now showing 27,641 miles. The 4-4-2 had logged an average of 1,000 miles per year since 2000. A vibration at 70 mph persisted despite wheels being re balanced several times. The problem was solved when a GM dealership installed a new front left spindle and wheel bearings.

A new heater core was installed summer, 2008 along with new hoses. In 2008 a Scranton Pennsylvania company Fleetpride cut the flywheel and balanced the driveshaft. Because of a missing switch on the shifter a toggle operated backup light system was installed. Standard shift cars use a linkage switch to turn on back up lights and it is frequently lost on these cars. Subsequent owners believe that the 4-4-2 has a rebuilt M21 transmission, new clutch, pressure plate and throw-out bearing, and pinion seal.

In 2009 Steve's Carburetor Shop in Lyndhurst, New Jersey shipped Chris and Dianne a new carburetor for the 4-4-2. The 4-4-2 was still undergoing some refinements at the time the couple put the car up for sale in 2010.

A Canadian buyer named Gary flew out to Pennsylvania to inspect the car. Gary was so impressed with the gaps and fit of the doors, hood and trunk he became the fourth owner. The car was subsequently shipped to Gary's home in Cloverdale, BC. The border documents its arrival July 9, 2010. On July 12, 2010 it failed inspection. Gary installed new front rotors, repacked wheel bearings, replaced one front spindle hose, replaced the driveshaft front yoke, universal joint and put in a new transmission output oil seal. He also replaced the windshield washer pump, headlights at Tireland.

Gary bought redline tires for the car then took the car to Jim Anderson at Ackyrod Brake and Muffler. They installed a Flowmaster exhaust system. The engine was misfiring at 5,500 RPM with the points distributor that came in the car. Gary installed an MSD electronic ignition and noted that the idle was different enough to change the tone of the engine. Gary replaced the transfer case for the transmission because it was cracked and leaking. The M21 in the car is not original to the car but is correct. This is a factory M21 car.

When Gary inherited a truck he had nowhere to store the 4-4-2 and sold it.

Fifth owner Les in Coquitlam, BC had a lien search done on the car on March 30, 2013 and registered it into his name. That same day the 4-4-2 failed Aircare on the idle test. The numbers were very low for the driving test, however. At this point the odometer read 36,516 miles. A garage replaced the water pump which enabled the 4-4-2 to pass the Aircare idle test. Les also purchased a new pilot bearing.

In July, 2013 the brake issues reappeared with a sinking brake pedal at an odometer reading of 37,241 miles. The brake master cylinder was replaced again, system flushed and the steel brake line relocated because it was too close to the left exhaust manifold. The heat was burning the fluid. The brakes were fine for nearly 2 years before they acted up again.

In October, 2013 the engine seemed noisy and rough when cold. The problem was traced to leaking exhaust manifolds. Both gaskets were replaced at 37,504 miles.

In 2014 a new rear license frame assembly with lens was added.

In 2015 Les redid the seats with new foam and covers and replaced the package tray. The brakes hit the floor again in April, 2015. The master cylinder was replaced under warranty but the problem persisted. The proportioning valve appeared to be sucking air and was replaced. At this point the odometer read 39,073 miles.

In March, 2016 the 4-4-2 was running at 200 degrees which it normally only did on the hottest days of summer. The radiator was power flushed and a 180 degree thermostat and new hoses were installed. The car currently runs around 188 degrees when warmed up.

67 oldsmobile 442 red bob p side haze

On Sep 28, 2016 at 5:30 PM the car gained its sixth owner, Bob. The car is smooth and solid without rattles and is very tight. It is possible the car is original low miles as believed by earlier owners. The original ignition key shows some wear. The words 'Your key to greater value' are still readable.

67 Oldsmobile 442 red bob ignition key

The heater fan switch doesn't sag at all and these usually droop on cars with any mileage. The light switch and windshield wiper are tight, too. Being a perfectionist, Bob had the seats re upholstered and carpet replaced with a kit that exactly duplicates the correct interior color. He had the undercarriage detailed, too.



Bob's 4-4-2 has typical options found on the hard core breed of brand new serious street warrior versions of the 4-4-2 back in 1967. Many new 4-4-2s had reasonable rear axles, automatic and power steering and brakes. This one is typical of the street stripper with no power steering and manual shift and higher axle ratio.

Bobs' 1967 Oldsmobile 4-4-2 has original configuration replacement brake pads, tires, radiator, front windshield, master cylinder, water pump, steering box, springs, calipers, brake drums and exhaust manifolds. Bobs' 4-4-2 retains the original steel wheels and hubcaps. It has front disc brakes which create more drag than the front disc option.

The alternator is incorrect with a plating of show chrome as are fan shroud, valve covers, breather and heater box. The firewall has been smoothed out in typical showcar style. The hassle of returning it to stock is too difficult to justify, so Bob has let that stand. The reproduction Super Stock wheels are 15 inches instead of factory 14.

Because of its drag strip heritage the 4-4-2 made it through all this time without ever having an accident.  Cars with perfect alignment get better MPG and this one tracks true.

Bob's 215R60-15 reproduction redline Michelin tires are about the same diameter as the stock 7.75 x 14 bias ply tires which are equivalent in diameter and width to P 215R70-14 tires. See the article about tires in this GAS LOGS section for more information.

Bob has filled the car with 94 octane Chevron gas and driven it a bit in nice weather. Extricating it from its parking spot with tough manual steering creates a bit of idle time which wastes gas. Otherwise it was driven in stop and go traffic with some stretches of open road where the car was pushed a bit. Shifts are usually made around 3,000 RPM.

I did a few runs in the car pulling out on idle then nailing it. I was shifting at 5,500 and cruised around 75 MPH and Bob has done a few quick takeoffs shifting at 4,000 RPM.

The 4-4-2 registers 2,500 RPM when cruising at 30 MPH in 3rd gear.

40 MPH in 4th gear= 2,200 RPM

50 MPH in 4th gear= 2,750 RPM

60 MPH in 4th gear= 3,000 RPM

70 MPH in 4th gear= 3,400 RPM

67 oldsmobile 442 bob speedo

Cruising in fourth gear at 2,750 RPM on a mild fall day the Stewart Warner temperature gauge sits at a cool 188 degrees with oil pressure reading about 44 pounds pressure. The stock spec 400 (overbored to 406 c.i.) engine is full of Castrol GTX 10W30 oil which is an easier flowing oil than used in the 4-4-2s back in 1967 but doesn't seem to affect oil pressure readings.

67 oldsmobile 442 bob tach

The modern oil may assist MPG readings because the engine doesn't work as hard to turn through modern oil as it would with single weight oil back in the day. The tires currently on the car are radials which roll easier than the old 1967 bias ply tires. The tires are also are inflated to a higher pressure than the low 26 PSI used back in the day.

Modern 94 octane gasoline is comparable to the old gas because the rating system used now is slightly different (modern numbers represent the half way point between motor research number and octane research number). The OOCC 4-4-2 also has some octane boost added to the tank to avoid pinging.

67 oldsmobile 442 bob red steveston gas

When recording fill ups the low angled position of the gas tank inlet tube behind the license frame sometimes causes the automatic shut off from the pump to kick in early. Sometimes the gas gauge registers slightly below full after the pump has shut itself off.

Odometer  Gallons   Octane  Full Tank?   MPG (uncorrected)

41,087      5.6          94        Full Tank    n.a.

41,110      2.3          94        Full minus   10.0 MPG City

41,123.5   3.2          94        Full minus     4.2 MPG City

41,149.0   3.0          94        Full minus     8.5 MPG City



Odometer  Gallons   Octane  Full Tank?   MPG (uncorrected)

41,481.4.   4.0.        94.       Full Tank.   n.a

41,511.7.   2.3.        94.       Full Tank.  13.2 MPG Highway (60-70 mph- 48 degrees F)



Last Updated ( Saturday, 15 May 2021 14:11 )