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1985 Oldsmobile Cutlass Supreme

Factory specifications, fluid capacities, torque values, EPA fuel economy and the federal safety record for the 1985 Cutlass Supreme.

The 1985 Oldsmobile Cutlass Supreme demands specific lubrication parameters to keep its powertrain operational, requiring a 4-quart engine oil capacity across 20W-20, 20W-40, or 20W-50 viscosities. Although the broader model line would later face severe scrutiny—peaking at 252 owner complaints in 1994—this particular year recorded a comparatively modest 21 total complaints, with Engine & Engine Cooling emerging as the top issue alongside three distinct recalls. Consequently, the 1985 iteration sits at the quieter end of the 1990-1996 reliability spectrum, meaning that while its engine cooling systems remain the primary vulnerability, this year represents a relatively stable chapter in the model's overall history.

Model year1997 1996 1995 1994 1993 1992 1991 1990 1985

Quick specs

Fluid capacities, tune-up values and fuel economy at a glance.

Engine oil capacity4 qtOEM · verified

Engine oil type20W-20 / 20W-40 / 20W-50OEM · verified

Fitment & sizes

Replacement part sizes and factory part numbers — battery, bulbs, filters and belts.

From the factory this vehicle uses OE oil filter 12731179. Each part links to every other vehicle that shares it, so a part you already stock may fit more of your fleet than you'd expect.

OE service part numbers OEM · verified

Engine oil filter	12731179 alt 25325404
Engine air filter	06484235 alt 06419892
Fuel filter	22522452 alt 5651803
Spark plug	19354430 alt 05613882
Front wiper blades	15184702
Serpentine belt	22524186 alt 09433640
Thermostat	10207373 alt 22547855

Full specifications

Engine, drivetrain, dimensions and economy.

Dimensions & weight NHTSA vPIC

Overall length	200 in
Overall width	71.7 in
Overall height	54.7 in
Wheelbase	108.3 in
Curb weight	3210 lb
Weight distribution (front / rear)	56/44

Service quick specs OEM factory data

Capacities, torques and tune-up values from the factory service manual.

This engine holds 4 qt of 20W-20 / 20W-40 / 20W-50 engine oil, DOT 3 brake fluid.

Lubricants & capacities

Brake Fluid	DOT 3
Engine Coolant	ETHYLENE GLYCOL
Engine Oil	20W-20 · 20W-40 · 20W-50 · 15W-40 · 10W-30 · 10W-40 · 5W-30
Engine Oil Capacity	4 qt
Engine Oil	20W-20 · 20W-40 · 20W-50 · 15W-40 · 10W-30 · 10W-40 · 5W-30
Engine Oil Capacity	4 qt
Engine Oil	API · 15W-30 · 10W-30
Engine Oil Capacity	7 qt

Factory maintenance schedule OEM · verified

Normal service, condensed from the factory interval matrix.

Under the factory schedule, replace the engine oil and filter every 5,000 mi.

At 5,000 mi	Exhaust Pressure Regulator (inspect) · Tire & Wheel Assembly (rotate)
Every 5,000 mi	Differential (inspect fluid level) · Engine Oil Filter (replace) · Fuel Filter Water Separator (inspect) · Shift Linkage (inspect) · Steering Linkage (inspect) · Suspension System (inspect)
At 7,500 mi	Carburetor Mounting Fasteners (inspect) · Choke System (inspect) · Drive Axle Assembly (drain & refill) · Engine Oil Filter (replace)
Every 7,500 mi	Body Latches, Locks & Hinges (inspect) · Brake System (inspect) · Engine Oil (drain & refill) · Exhaust System (Complete) (inspect) · Parking Brake Cable (lubricate) · Steering System (inspect)
Every 15,000 mi	Engine Oil Filter (replace) · Exhaust Pressure Regulator (inspect) · Tire & Wheel Assembly (rotate)
Every 30,000 mi	Accessory Drive Belt (inspect) · Choke System (inspect) · Diesel Fuel Injection Pump Timing (inspect) · Distributor Cap (inspect) · Distributor Vacuum Advance (inspect) · EGR System (inspect)
Every 100,000 mi	Transmission Fluid & Filter (replace)

Reliability & federal safety record

Owner-reported issues, recalls, investigations and service bulletins on record with NHTSA — an unfiltered look at what owners actually experience.

The 1985 Oldsmobile Cutlass Supreme sits at the early end of the generation, before the federal record begins in 1990. While the year-by-year data from 1990–1996 shows complaint volumes fluctuating between 90 and 252, with a peak in 1994, the 1985 model itself logged 5 engine/cooling complaints, 4 powertrain, 3 steering, and 3 vehicle-speed-control complaints, plus 3 crash and 3 fire incidents. This pattern aligns with the later years' persistent engine and drivetrain issues, though the data does not specify root causes. Recalls across the generation declined from 8 in 1990–1991 to 1 in 1995, suggesting that later model years may have received more cumulative fixes. Given the 1985's age and the presence of safety-related complaints in steering and speed control, this is a high-risk buy unless a comprehensive pre-purchase inspection confirms all known problem areas have been addressed.

Open recalls

NHTSA campaigns

Service bulletins

Manufacturer communications

ODI investigations

Office of Defects Investigation

Owner complaints

3 involved a crash · 3 a fire

NHTSA crash-test rating federal NCAP · out of 5 stars

Overall★★★★★

Frontal★★★★★

Side★★★★★

Rollover★★★★★

Owner complaints by model year NHTSA · this generation & adjacent

’90 ’91 ’92 ’93 ’94 ’95 ’96

Owner complaints filed with NHTSA, by component

All 21 complaints on record, top 8 components.

Engine & Engine Cooling5

Power Train4

Steering3

Vehicle Speed Control3

Tires2

Suspension2

Seat Belts,Vehicle Speed Control1

Parking Brake1

Source: NHTSA Office of Defects Investigation complaint database.

Recalls NHTSA · verified

Showing 2 of 3 campaigns on record for this vehicle.

89V102000Vehicle Speed ControlReported 16/06/1989

A SMALL NYLON BUSHING IN THE CRUISE CONTROL SERVO BAIL MAY SLIP OUT OF PLACE, CAUSING INTERMITTENT AND UNEXPECTED INCREASES IN ENGINE SPEED OR DIESELING (ENGINE RUN ON WITH IGNITION OFF). Remedy: INSTALL A NEW BUSHING IN CRUISE CONTROL SERVO BAIL.

84V124000Steering:Linkages:Tie Rod AssemblyReported 10/10/1984

THE TIE RODS ARE PART OF THE STEERING LINKAGE AND TRANSMIT TURNING MOVEMENTS TO THE WHEELS. THE BOLTS THAT FASTEN THE TIE RODS TO THEIR ADJUSTERS MAY NOT BE TIGHT ENOUGH. THIS COULD ALLOW THE TIE ROD TO LOOSEN AND… Remedy: THE TIE ROD END BOLTS WILL BE TIGHTENED WITHOUT COST TO THE OWNER.

Common OBD-II trouble codes

The most common OBD-II codes for this vehicle's emissions system. These are standardized SAE J2012 definitions, not vehicle-specific fault reports.

P0420

Catalyst system efficiency below threshold — Bank 1

P0300

Random / multiple cylinder misfire detected

P0171

System too lean — Bank 1

P0455

Evaporative emission system leak detected — large leak

P0128

Coolant thermostat below regulating temperature

P0442

Evaporative emission system leak detected — small leak

VIN tools

Decode factory build data for a specific vehicle by VIN.

VIN

Decode a VIN to confirm the transmission and build data for a specific Cutlass Supreme. OEM

Build data

Plant, GVWR class, engine and body data for any 17-character VIN.

Recalls

Check open recall campaigns against a specific vehicle by VIN.

Vehicles with shared specs

Find every vehicle that shares this one's battery, bulbs, oil capacity, platform or parts.

Vehicles taking 4 qt Engine oil filter 12731179 Engine air filter 06484235 Fuel filter 22522452 Spark plug 19354430

Reference guides

Cross-vehicle references for the kinds of data on this page.

Vehicle recalls & TSBs OBD-II trouble codes Maintenance schedules Fluid capacities & specs

Frequently asked

How much oil does the 1985 Cutlass Supreme take?

4 qt of ABOVE 40 degrees F: 30, ABOVE 20 degrees F: 20W-20, 20W-40, 20W-50, ABOVE 10 degrees F: 15W-40, ABOVE 0 degrees F: 10W-30 OR 10W-40, BELOW 60 degrees F: 5W-30, per the factory manual.

Does the 1985 Cutlass Supreme have open recalls?

NHTSA lists 3 recall campaign(s) for this model year. Check your specific vehicle by VIN.