
Oldsmobile Series 98 Second Generation 1965–1970

Eighth generation | |
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![]() 1965 Oldsmobile 98 convertible
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Overview | |
Model years | 1965–1970 |
Assembly | Lansing, Michigan, U.S. Linden, New Jersey, U.S. |
Designer | Bill Mitchell |
Body and chassis | |
Body style | 2-door hardtop 4-door sedan 4-door hardtop 2-door convertible |
Layout | FR layout |
Platform | GM C platform |
Related | Cadillac Eldorado Cadillac De Ville Cadillac Calais Buick Electra |
Powertrain | |
Engine | 425 cu in (7.0 L) Rocket V8 455 cu in (7.5 L) Rocket V8 |
Transmission | 3-speed TH-400, automatic |
Dimensions | |
Wheelbase | 1965–68: 126.0 in (3,200 mm) 1969–70: 127.0 in (3,226 mm) |
Length | 1965: 222.9 in (5,662 mm) 1966–67: 223.0 in (5,664 mm) 1968: 223.7 in (5,682 mm) 1969: 224.4 in (5,700 mm) 1970: 225.2 in (5,720 mm) |
Width | 80.0 in (2,032 mm) |
Height | 1965–68: 55.8 in (1,417 mm) 1969–70: 54.8 in (1,392 mm) |
Curb weight | 4,300–4,700 lb (2,000–2,100 kg) |


The 1965 98 was completely redesigned from the ground up along with other full-sized General Motors cars but retained the larger C-body shared with Cadillac and Buick Electra in contrast with the B-body used in the Oldsmobile 88.
The Ninety-Eight featured many of the lines found on 88s but with more squared off styling. The exclusive 98 wheelbase had five body styles. The Custom Sport Coupe was gone and the 4-door 6-window body styles were replaced with 4-door 4-window body styles. The Luxury Sedan was no longer a hardtop but featured a more luxurious interior along with more standard amenities than the Town Sedan such as power seats. Most 98 Luxury Sedans also had vinyl roofs, which were offered only in black that year. For the first time since 1962 all hardtops were once again called Holidays.
Standard equipment included automatic transmission, power steering and brakes, power windows, clock, padded dash, foam padded seats, parking brake light, Deluxe steering wheel, special wheel covers, windshield washer and two-speed electric wipers, courtesy and glovebox lamps, and front seat belts. Standard tire size was 8.55 x 14 inches. A new three-speed Turbo-Hydramatic automatic transmission with torque converter replaced the dismal three speed Roto Hydramatic that Oldsmobile had been using for the last three model years. Along with the transmission and redesigned platform, the engine was also new for 1965. It was a 425 cu in (7.0 L) Super Rocket V8 that was more powerful and of a more efficient design than the older 394 cu in (6.5 L) Rocket V8 previously used, yet it was much lighter in weight. The 98's standard and only engine offering for 1965 was the four-barrel "Ultra High Compression" version of the 425 Super Rocket rated at 360 horsepower (270 kW). Ninety-Eights were built only in Lansing.
Between 1965 and 1975 Oldsmobile commissioned Cotner-Bevington to build professional cars, (ambulances and hearses), using the large Ninety-Eight chassis. Ironically, during the '60's (1968), the only Oldsmobile professionally made into a limousine was the smaller Toronado, known as the AQC Jetway 707.
Some luxury market buyers purchased either the Starfires or the new Toronados in 1966 but the 98 remained the full-size top-of-the-line Oldsmobile. Five models, including a trio of 4-doors were available. Standard equipment included: Turbo-Hydramatic transmission; power steering, brakes, windows and seats; special wheel covers; front and rear seat belts; carpeting; windshield washer and two-speed wipers; foam seat cushions; electric clock and special armrests on selected models. Upholstery was cloth, vinyl and leather. Standard tire size was 8.55 x 14 inches. Ninety-Eights were built in Lansing.
In 1967 the sporty elegance of the Starfire was gone. The 98 and the Toronado were now Oldsmobile's remaining luxury cars. There were five 98 body styles available. Standard 98 trim included: armrests, power brakes, dual cigarette lighters, electric clock, carpeting, lamp package, molding package, seat belts, power seats, power steering, Turbo-Hydramatic and power windows. Upholstery was cloth, vinyl or leather. Standard tire size was 8.85 x 14 inches. Ninety-Eight models were built in Lansing.




In 1968 Oldsmobile continued to produce five well appointed 98 body styles. Standard equipment included: dual master cylinder, four way flasher, energy-absorbing steering column, back-up lights, side marker lights, seat belts, cross-flow radiator, rear armrest ashtrays, power brakes, electric clock, special moldings, shoulder belts, Deluxe steering wheel, power steering, carpeted trunk and Turbo-Hydramatic transmission. Upholstery was cloth, vinyl or leather. Standard tire size was 8.85 x 14 inches. Engine displacement was increased to the Rocket 455 cu in (7.5 L) V8 with 365 horsepower. Ninety-Eight production was in Lansing.
The 1969 98 conventional front engine/rear drive car remained the top-of-the-line Oldsmobile. It was the largest Oldsmobile product offered and now had a 127.0 in (3,226 mm) wheelbase. Six body styles were now available with a hardtop version of the Luxury Sedan added to the lineup. New to the 98 series were a recessed padded instrument panel, anti-theft lock within the steering column, rear view mirror map light, mini-buckle seat belts, and deeply padded head restraints. Standard equipment included: power brakes, self-regulating electric clock, full carpeting, courtesy lamps, paint stripes, power seat adjuster, seat belts and shoulder harnasses, power steering, Deluxe steering wheel, power windows, Turbo-Hydramatic transmission, custom sport seat, foam padded front seat, and wheel discs (hub caps). Standard tire size was 8.85 x 14 inches. Upholstery was vinyl, cloth or leather. The 98's standard engine was still the Rocket 455 which required premium leaded gas. All 98s were made in Lansing and had the code letter M.
Some of the available 1969 options were a tilt-telescope steering wheel, instant horn, four season air conditioning with comfortron, tinted glass windshield, 6-way power seat, divided front seat with dual controls, power trunk release (vacuum), power door locks, power front disc brakes, AM-FM stereo radio, rear seat speaker, stereo tape player (8-track), power operated antenna, door edge guards, cruise control, left outside remote control mirror, cornering lamps, anti-spin rear axle, vinyl roof, flo-thru ventilation, and safety sentinel.
Of the 98 series, the 1969's were the only models to have an attached hood extension. After receiving numerous complaints from dealership mechanics about hitting their heads on the extension, Oldsmobile changed the style of the hood in 1970, removing the extension, which resulted in a flat hood design.
In 1970, the 98s were the largest Oldsmobiles. They still shared the luxury side of Oldsmobile business with the Toronado. Standard equipment included: Turbo-Hydramatic 400 transmission, power steering, power brakes with front discs, power windows, power seats, Deluxe steering wheel, electric clock and full wheel discs. Standard tire size was J78-15. Interiors were vinyl, cloth or leather. All 98s were made in Lansing indicated by the codel letter M in the Vehicle Identification Number. The length grew to 225.2 inches.