SOLD on May 26, 2026

Elite Dealer

1970 Oldsmobile 98

Michigan

$19,295

Vehicle Details

Make

Oldsmobile

Model

Year

1970

Mileage

74,369 miles

Drivetrain

RWD

Fuel Type

Gasoline

Engine

and has original clear plastic seat covers

Condition

Good

Description

1970 Oldsmobile 98 Luxury Sedan with only 74368 Miles and One Owner, Rocket 455 Engine and has original clear plastic seat covers. New top, new copper radiator & antifreeze, new water pump, coils, spark plugs, vacuum hose, fuel pump, fan motor & thermostat, battery, and tires. Please Note The Following **Vehicle Location is at our clients home and Not In Cadillac, Michigan. **We do have a showroom with about 25 cars that is by appointment only **Please Call First and talk to one of our reps at 231-468-2809 EXT 1 **

Oldsmobile 98 Buyer's Guide

Full guide

Sarah Whitfield

Pre-War Classics

1941–1976

~2 min read

Updated Apr 2026

The Oldsmobile 98 was GM's statement that luxury and performance need not be mutually exclusive — a full-size flagship that introduced the high-compression overhead-valve V8 to the American public and defined the postwar luxury car formula for a generation.

This guide covers

✓ 8-point inspection checklist

✓ Common issues & what to avoid

✓ In-person inspection guide

✓ Market pricing by year & condition

✓ 4 FAQs answered

✓ History & fun facts

Read the Full 98 Buyer's Guide

Oldsmobile 98 Market Overview

Based on 22 Oldsmobile 98 listings currently on ClassicCarsArena.com

Listed Now

$25,966

Avg. Asking Price

1941–1982

Year Range

Price Position on Our Site — Average Range

This car: $19,295

Low: $10,000 High: $72,995

Transmission Distribution

Automatic 73%

Manual 14%

Condition Distribution

Excellent 5%

Good 9% ◄

Fair 14%

Data from ClassicCarsArena.com listings Browse all 22 listings →

Oldsmobile 98 Buyer's Guide

Sarah Whitfield here. The Oldsmobile 98 is a car that deserves serious historical recognition alongside the Cadillacs and Lincolns it competed with. In 1949, Oldsmobile introduced the Rocket 88 — the car that most historians credit as the first true muscle car — and the 98 carried a version of that same revolutionary overhead-valve V8 in its full-size luxury body. The combination of genuine performance and genuine comfort was unprecedented at the 98's price point.

The 98 ran from 1941 through 1996, but the classic era — the years that define what the 98 means to collectors — runs from the 1949 Rocket V8 introduction through the mid-1970s. These are full-size luxury cars with an engineering pedigree that even Cadillac had to respect, and they're available at prices that reflect the market's incomplete appreciation of their significance.

What to Check Before Buying

✓

Rear Quarter Rust — Probe lower rear quarters and trunk floor — structural rust on the C-body platform is expensive to repair.

✓

Cowl Area — Check under windshield base for water intrusion corrosion.

✓

Rocket V8 Condition — Warm the engine and check for oil leaks, especially at the rear main seal, and verify smooth idle.

✓

Hydra-Matic Operation — On pre-1964 cars, test all four Hydra-Matic ranges — rebuilds run $1,500–$2,500 at a transmission specialist.

✓

Air Ride Suspension (1958–1960) — On air-suspension equipped cars, check for proper operation — failure is common and restoration is specialized work.

✓

Interior Originality — Verify interior material and color combination match factory specification for the year.

✓

Chrome Condition — Inventory all exterior chrome for pitting — re-plating can cost $3,000–$8,000 for a full treatment.

✓

Engine Identification — Note displacement (303, 324, 371, 394, 425ci) — larger displacement cars command premiums.

Common Issues

Lower rear quarter and trunk floor rust on northern-state C-body examples. Hydra-Matic transmission rebuild requirement on high-mileage pre-1955 cars. Rocket V8 oil leaks from rear main seal. Air ride suspension failure on 1958–1960 equipped cars (expensive and complex to restore). Interior material deterioration — original combinations are difficult and expensive to reproduce. Chrome pitting on exterior trim from environmental exposure.

What to Look For

Inspect the lower rear quarter panels and trunk floor for rust — these are the structural weak points on the C-body GM platform. Check the cowl area under the windshield for water intrusion rust. Verify the Rocket V8 (or later 425ci) runs smoothly without overheating — Olds engines are robust but maintenance-sensitive. On the 1949–1955 cars, confirm the Hydra-Matic automatic transmission engages all four ranges correctly. On post-1965 cars, check the Turbo-Hydramatic for smooth operation. Verify interior material is original — full leather or the correct fabric-and-leather combinations are important for value.

Price Guide

1949–1953 Rocket 98 sedans: $10,000–$22,000. 1954–1957 98 hardtops: $15,000–$35,000. Convertibles (any year): add 30–50%. 1965–1970 98 with 425ci: $12,000–$28,000. Concours-quality restorations: $35,000–$70,000+. Comparison: equivalent years typically sell for 30–50% below comparable Cadillac DeVille, offering significant value relative to quality.

Did You Know?

The 1949 Oldsmobile Rocket V8 is widely credited as the catalyst for the American horsepower race — within two years of its introduction, every major American manufacturer had introduced or was developing a high-compression overhead-valve V8. The 98 designation referred to Oldsmobile's internal model numbering, not any specific technical specification. The 1951 Oldsmobile 88 — a lighter-body 98 engine combination — is considered by many historians to be the first true muscle car, predating the GTO by 13 years.