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1986 Oldsmobile Firenza

Factory specifications, fluid capacities, torque values, EPA fuel economy and the federal safety record for the 1986 Firenza.

The 1986 Oldsmobile Firenza is a compact model that relies on a 4‑quart capacity of 5W‑30 API‑specified engine oil, a specification that underscores its modest powertrain requirements. In its year of production the vehicle recorded just a single owner complaint, centered on visibility issues, and was subject to two recalls, indicating that while minor concerns surfaced, the overall reliability record remains relatively clean. This modest complaint count places the 1986 Firenza toward the more dependable end of the model’s historical reliability spectrum, suggesting that owners of this year generally experienced fewer systemic problems than in other iterations.

Model year1988 1987 1986 1985 1984 1983 1982

Quick specs

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

Engine oil capacity4 qtOEM · verified

Engine oil type5W-30 APIOEM · verified

Fitment & sizes

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

From the factory this vehicle uses OE oil filter 12731175. Note the factory engine air filter and fuel filter are now discontinued — plan on a superseded or quality aftermarket equivalent, which the part pages below list where known. 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	12731175 alt 12737090
Engine air filter	25040881 discontinued · alt 25043119
Fuel filter	25171792 discontinued
Spark plug	19300874 alt 19354422
Front wiper blades	15184702
Serpentine belt	09433754 alt 09433716
Thermostat	10192505 alt 03043066

Full specifications

Engine, drivetrain, dimensions and economy.

Dimensions & weight NHTSA vPIC

Overall length	176.4 in
Overall width	65 in
Overall height	53.5 in
Wheelbase	101.2 in
Curb weight	2396 lb
Weight distribution (front / rear)	64/36

Service quick specs OEM factory data

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

This engine holds 4 qt of 5W-30 API engine oil, DOT 3 brake fluid.

Lubricants & capacities

Brake Fluid	DOT 3
Engine Coolant	ETHYLENE GLYCOL
Engine Oil	5W-30 · API
Engine Oil Capacity	4 qt
Engine Oil	5W-30 · API
Engine Oil Capacity	3 qt
Engine Oil	5W-30 · API
Engine Oil Capacity	3 qt

Factory maintenance schedule OEM · verified

Normal service, condensed from the factory interval matrix.

Under the factory schedule, replace the engine oil and filter at 7,500 mi; coolant every 30,000 mi. The big-interval services (every 30,000 mi for coolant, and the transmission fluid) are the ones owners most often skip — on a lower-mileage example, assume the original fluids are still in it and check them first.

Every 5,000 mi	Clutch Pedal Assembly (inspect)
At 7,500 mi	Engine Oil Filter (replace) · Throttle Body (torque) · Tire & Wheel Assembly (rotate)
Every 7,500 mi	Axle Shaft Oil Seal (inspect) · Body Latches, Locks & Hinges (inspect) · Brake System (inspect) · CV Joint Boot (inspect) · Engine Oil (drain & refill) · Engine Oil Filter (replace)
Every 15,000 mi	Engine Oil Filter (replace) · Tire & Wheel Assembly (rotate)
Every 30,000 mi	Accessory Drive Belt (inspect) · Distributor Cap (inspect) · EGR System (inspect) · Engine Air Filter Element (replace) · Engine Breather Filter (replace) · Engine Coolant System (drain, flush & refill)
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.

Owner complaints about the 1986 Oldsmobile Firenza dominate in one area — the visibility, 1 of 1 reports (100%), well ahead of the next concern. None of this vehicle's 2 recall campaigns target the visibility, so those reports read as owner-reported wear-and-tear rather than an acknowledged defect. 0 of the reports describe a crash and 0 a fire — a small share of the total, but worth weighing against the visibility pattern above. These are tallies of what owners actually reported to the federal government, not an editorial score — and higher-selling models naturally rack up more reports.

Open recalls

NHTSA campaigns

Service bulletins

Manufacturer communications

ODI investigations

Office of Defects Investigation

Owner complaints

0 involved a crash · 0 a fire

Owner complaints filed with NHTSA, by component

All 1 complaints on record, top 1 components.

Visibility1

Source: NHTSA Office of Defects Investigation complaint database.

Recalls NHTSA · verified

Showing 2 of 2 campaigns on record for this vehicle.

06E043000Fuel System, GasolineReported 19/05/2006

CERTAIN REPLACEMENT FUEL FILTERS, FRAM BRAND NAME P/N G3727, WITH DATE CODES X52911 THROUGH X60801 SEQUENTIALLY OR X600141 AND A MEXICO COUNTRY OR ORIGIN MARKING ON THE FUEL FILTER HOUSING MANUFACTURED FROM OCTOBER 18… Remedy: HONEYWELL WILL NOTIFY OWNERS AND REPLACE THE FUEL FILTERS FREE OF CHARGE. THE RECALL BEGAN ON OCTOBER 18, 2006. OWNERS MAY CONTACT FRAM CUSTOMER SERVICE AT 1-800-890-2075 (OPTION…

86V062000Exterior Lighting:Tail LightsReported 13/05/1986

THE RIGHT REAR TAIL LAMP ASSEMBLY MAY BE INCORRECTLY ASSEMBLED. THE MISASSEMBLED UNITS WILL RESULT IN REDUCED ILLUMINATION WHICH WILL CAUSE THE LAMP ASSEMBLY TO BE IN NON-COMPLIANCE WITH FMVSS 108 LAMPS, REFLECTIVE… Remedy: REPLACE RIGHT REAR TAIL LAMP ASSEMBLY AS NECESSARY.

Technical service bulletins NHTSA · verified

Showing 1 of 1 bulletins on record with NHTSA.

Bulletin	Date	Component	Summary
000524001	2000-04-01	Service Brakes, Hydraulic	INFORMATION REGARDING SNOW INTRUSION INTO REAR DRUM BRAKE ASSEMBLIES. **MR

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 Firenza. 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 12731175 Engine air filter 25040881 Fuel filter 25171792 Spark plug 19300874

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 1986 Firenza take?

4 qt of 5W-30 API, per the factory manual.

Does the 1986 Firenza have open recalls?

NHTSA lists 2 recall campaign(s) for this model year. Check your specific vehicle by VIN.