Basic Information and History

The 1970 Oldsmobile Ninety Eight Convertible is a timeless classic from the peak years of the American muscle car era, where luxury and power were combined in a nearly uncompromising way for its time. With its distinctive design language, generous exterior dimensions, and an exceptional comfort package, this model stands today as one of the most sought-after American convertibles from the period.

The example now being auctioned at Bidders Highway was originally delivered in the USA and later imported to Sweden, where it has had only one user after import. Original manuals remain, along with some documented history and receipts.

About the Model

The Oldsmobile Ninety Eight was the top-of-the-line model in 1970, representing the best General Motors had to offer in terms of comfort, space, and technical solutions. The convertible version combined prestigious design with a driving experience well above the average in its segment.

The model is characterized by its generous length of over 5.7 meters, its luxurious interior with space for six adults, and a solid chassis with a focus on both strength and smooth ride quality. The Ninety Eight symbolized Oldsmobile’s ambition to compete directly with Cadillac and Buick on the luxury market, but with a clearer sporty undertone.

The Engine – Oldsmobile Rocket 455

Under the hood sits Oldsmobile’s famous Rocket 455 V8, a motor that has become legendary in American car history. With its 7.5 liters, it delivered up to 365 hp in standard configuration and massive torque at low revs, making it the perfect combination of power and drivability.

The Rocket 455 was known for its reliability and strong torque range, and in the Ninety Eight it provided both majestic cruising and more than enough power to move this large convertible effortlessly. For many enthusiasts, the Rocket 455 is the heart that makes the model so desirable today – embodying the “bigger is better” philosophy of American automotive history while delivering a classic V8 sound.

Equipment and Options

1. Originally equipped with AC – all components remain although the system is disconnected
2. Aluminum wheels fitted, original wheels and hubcaps included
3. Swedish-installed tow hitch (1500 kg with B96, otherwise 750 kg)
4. Custom-built stereo with large amplifier and subwoofer in trunk
5. Underbody treatment and cavity protection applied
6. New alternator (110 amp)
7. New battery with master switch
8. Upgraded exhaust system – dual pipes instead of original single pipe
9. Renovated and replaced convertible top with glass rear window
10. New windshield and recently replaced rear window
11. New side mirrors left/right – original left mirror included
12. Original controls in usable condition
13. Original manuals and some documentation

Modifications and Improvements

The car has been upgraded for increased reliability, including a new alternator, new battery with master switch, and an improved exhaust system. Tow hitch and electrical connections have been professionally installed in Sweden. Interior and exterior mirrors have been updated, with the original left mirror included.

The AC system has been removed but all parts remain for reinstallation if desired. The stereo system has been significantly upgraded compared to the original.

Condition

Body and Exterior:

The entire car was repainted 10 years ago in the original 1970 red color (replacing previous moss green). All areas were painted, and earlier trunk rust was repaired with new sheet metal. New side mirrors fitted. Minor stone chips present, otherwise very good overall condition. New windshield (5 years), new rear window (10 years), side windows in fine condition. Chrome, trim, and emblems in good condition.

Interior:

The interior is in good usable condition, with one note: a 20 cm seam has come apart in the rear seat. Headliner in like-new condition. Original controls work, although the light switch is loose. Stereo and speaker system upgraded.

Wheels and Tires:

The car sits on nearly new tires and aluminum wheels. Original wheels and hubcaps included.

Mechanics and Function:

Engine in good working order, with newly renovated radiator, resurfaced heads, and worked manifolds. New carburetor. Braking system with front discs and rear drums – all in good condition. Transmission shifts smoothly. AC system non-functional but complete. Electrical system upgraded with new alternator, new battery, and master switch. Exhaust system upgraded to dual pipes.

Service History

The car has received regular maintenance and service. Most recently (2024): oil change, filter change, new air filter, new spark plugs, brake fluid, and new differential oil. Radiator newly renovated, heads resurfaced, and new carburetor installed.

The car has always passed inspections without remarks under current ownership until it became exempt. Some service receipts included.

Summary

A rare opportunity for the connoisseur to acquire a well-equipped and well-maintained 1970 Oldsmobile Ninety Eight Convertible – an icon from the pre-oil crisis American automotive era. With extensive upgrades for Nordic conditions and a carefully documented maintenance history, this car offers a unique ownership and driving experience. Perfect for anyone seeking a truly uncompromising American convertible with the right attributes and usability, but also for collectors looking for something special from the 1970s – ready for both driving and showing!