The Oldsmobile Cutlass Supreme is a mid-size car produced by Oldsmobile between 1966 and 1997. It was positioned as a premium offering at the top of the Cutlass range. It began as a trim package, developed its own roofline, and rose during the mid-1970s to become not only the most popular Oldsmobile but the highest selling model in its class. It was produced as a rear-wheel drive two-door hardtop, sedan, and station wagon into the 1980s, and a convertible through 1972. In 1988 Oldsmobile sought to capitalize on the brand equity of the Cutlass Supreme marque by replacing it with a downsized front-wheel drive model based on the GM10 platform W-platform. When production ended there was no direct replacement for the Cutlass Supreme, although the Intrigue introduced for 1998 was designed in size and price to replace all the Cutlass models.
Second generation (1968-1972)
The Cutlass and other GM intermediates were completely restyled for 1968 with wheelbases shortened to 112 inches (2,845 mm) for 2-door coupe models and lengthened one inch to 116 in (2,946 mm) for four-door sedans and station wagons (with the exception of the glass-roof Vista Cruiser station wagon, which rode on an even longer 121-inch (3,100 mm) wheelbase). The Cutlass Supreme, now the top-line Olds intermediate series, was pared down to two- and four-door hardtop models with the pillared sedans and coupes dropped and the convertible moved to the lower-priced Cutlass "S" line, upon which the 4-4-2 muscle car was now based. Also the standard Rocket V8 was enlarged from 330 to 350 cubic inches with 310 hp (231 kW).
The 1969 models received only a minor facelift such as a new split grille and vertical taillights with the same model and engine offerings. A new three-speed Turbo Hydra-matic 350 was added to the option list to replace the two-speed Jetaway automatic. Headrests were made standard equipment due to federal safety mandate and the ignition switch moved from the instrument panel to the steering column, which also was designed to lock the steering wheel. This ignition/steering wheel interlock, found on all 1969-model General Motors passenger cars, except for the Corvair, debuted one year before the federal government mandated it on all 1970 models.
For 1970, the Cutlass Supreme nameplate was switched to Oldsmobile's equivalent of the downsized Pontiac Grand Prix on the A-body, to give the division an entry in the burgeoning market for smaller personal luxury cars. As such, the two-door hardtop had a new notchback roofline, while lower trim-line Cutlass coupes had a fastback style roof. The model remained in this role for virtually all of its production life. Unlike the Grand Prix and the also-related Chevrolet Monte Carlo, which had wholly separate bodies and names from their less expensive siblings, the Supreme shared front and rear body parts with the standard Cutlass line and was always marketed as part of it. In addition to the two-door hardtop (Holiday Coupe), the Cutlass Supreme series for 1970 also included a four-door hardtop (Holiday Sedan) and regained the convertible bodystyle.
Supreme interiors were more luxurious that those of other Cutlass models, with a choice of a Custom Sport notchback bench seat with armrest in Osborne cloth or Moroccan vinyl or, at no extra cost (on coupes and convertibles only), Strato bucket seats in Moroccan vinyl. Available at extra cost with the bucket seats was a center console with floor-mounted shifter for which the Turbo Hydra-Matic transmission could also be had with the Hurst Dual-Gate shifter commonly found in the division's musclecar, the Oldsmobile 442.
For 1970 and 1971, both the Cutlass Supreme coupe and convertible were available with the Code Y-79 high performance SX option package. The "SX" option included several versions of the larger 455 cubic-inch Rocket V8 borrowed from the Olds 442 along with the cutout rear bumper and exhaust trumpets, 442's rallye suspension (optional), distinctive SX badges and other features.
A W31 option added distinctive stripes and badging, and a camshaft with increased lift and duration for the 350 engine. The W31 option was offered on Supreme coupes only in 1968, but continued on lower-line F-85 and Cutlass S coupes through 1970.
1972 was the only year in which the Cutlass Supreme notchback hardtop could be equipped with the L75 455 and M20 four speed transmission, and only 77 of these cars were produced. All 1972 L75 455/M20 cars used the larger 2.07 valves and the W30 automatic camshaft. This gave the L75 455/M20 cars 270 net horsepower, as opposed to the TH400 automatic-equipped L75 cars, which produced 250 net horsepower.
The 1972 Hurst/Olds was based on the Supreme two-door hardtop and convertible, powered by both versions of the 455 Rocket offered on the 4-4-2, along with a Turbo 400 transmission with Hurst Dual/Gate shifter. The H/O convertible also served as the Indianapolis 500 Pace Car in 1972. 1972 was also the final year for Olds to offer the Cutlass Supreme convertible, until 1990. In its final year, it was the best-selling convertible in the U.S., with 11,571 sold, or 16% of the market, beating the Eldorado and Corvette. From 1973 to 1975, the only Oldsmobile convertible offered was the full-sized Delta 88 Royale.
Source: Wikipedia
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