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1985 Oldsmobile Eighty Eight

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

The 1985 Oldsmobile Eighty Eight takes 4 qt of 20W-20 engine oil.

Model year1997 1986 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 12731175
Engine air filter	06484235 alt 06419892
Fuel filter	22522452 alt 5651803
Spark plug	19354430 alt 19366108
Serpentine belt	22524186 alt 9433646
Thermostat	10207373 alt 01250390

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, 80W-90 · GL-5 in the differential, DOT 3 brake fluid.

Lubricants & capacities

Brake Fluid	DOT 3
Differential Gear Oil	80W-90 · GL-5
Differential Gear Oil Capacity	4.4 qt
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	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)

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 Eighty Eight. 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.

OBD-II trouble codes Maintenance schedules Fluid capacities & specs

Frequently asked

How much oil does the 1985 Eighty Eight 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.