CadillacFleetwood1986Overview/cadillac/fleetwood/1986/base/

1986 Cadillac Fleetwood

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

Transmission Automatic 4-spd

The 1986 Cadillac Fleetwood utilizes an Automatic 4-spd transmission to deliver EPA fuel economy ratings of 16/23/19 mpg, requiring 4.5 qt of engine oil with viscosity options including 20W-20, 15W-40, and 10W-30. Reliability data for this model year documents 5 recalls and 7 total owner complaints, identifying the Electrical System as the top complaint area. This volume of feedback defines the 1986 model year's reliability standing before the 1990-1998 period, where reported issues fluctuate between a low of 4 and a high of 46.

Model year199619951994199319921991198919881986

Quick specs

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

Engine oil capacity4.5 qtOEM · verified
Engine oil type20W-20 / 15W-40 / 10W-30OEM · verified
EPA fuel economy16/23/19 mpgEPA · 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. Note the factory fuel filter is now discontinued — plan on a superseded or quality aftermarket equivalent, which the part pages below list where known.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 filter12731179
Engine air filter25040929 alt 06484235
Fuel filter5651803 discontinued · alt 25171792
Spark plug19354416 alt 19366108
Front wiper blades15184702 alt 05049938
Serpentine belt09433760 alt 09433853
Thermostat03539588 alt 22538325

Full specifications

Engine, drivetrain, dimensions and economy.

Engine & drivetrain NHTSA vPIC

TransmissionAutomatic 4-spd

Dimensions & weight NHTSA vPIC

Overall length194.9 in
Overall width71.7 in
Overall height55.1 in
Wheelbase111 in
Curb weight3358 lb
Weight distribution (front / rear)64/36

Ratings & economy EPA / vPIC

EPA city / highway / combined16 / 23 / 19 mpg
DrivetrainRear-Wheel Drive
Passenger volume110 cu ft
Cargo volume20 cu ft
Recommended fuelRegular Gasoline

Performance & power Independent road tests

0–60 mph, quarter-mile, horsepower and torque from independent road tests.

Independent road tests for the Fleetwood of this era, listed by trim and engine — this page spans more than one engine, so no single horsepower figure is shown.

9.1–11.7 sec0–60 mph (tested)quickest 9.10 sec — 1989 60 Special Sedan
YearTrim / engine0–60¼ mileHPDrivetrain
1985Sedan 4.1L V811.70 sec18.20 sec135 hpFWD
198960 Special Sedan 4.5L V89.10 sec17.00 sec155 hpFWD

Service quick specs OEM factory data

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

This engine holds 4.5 qt of 20W-20 / 15W-40 / 10W-30 engine oil, 80W-90 · GL-5 in the differential, DOT 3 brake fluid.

Lubricants & capacities

Brake FluidDOT 3
Differential Gear Oil80W-90 · GL-5
Differential Gear Oil Capacity4.3 qt
Engine CoolantETHYLENE GLYCOL
Engine Oil20W-20 · 15W-40 · 10W-30
Engine Oil Capacity4.5 qt
Engine Oil20W-20 · 15W-40 · 10W-30
Engine Oil Capacity4.5 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; 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 miEngine Oil Filter (replace)
At 7,500 miCarburetor Mounting Fasteners (inspect) · Choke System (inspect) · Drive Axle Assembly (drain & refill) · Throttle Body (torque) · Tire & Wheel Assembly (rotate)
Every 7,500 miBrake System (inspect) · Differential (inspect fluid level) · Engine Oil (drain & refill) · Exhaust System (Complete) (inspect) · Parking Brake Cable (lubricate) · Shift Linkage (inspect)
Every 15,000 miTire & Wheel Assembly (rotate)
Every 30,000 miAccessory Drive Belt (inspect) · Choke System (inspect) · EGR System (inspect) · Engine Air Filter Element (replace) · Engine Breather Filter (replace) · Engine Coolant System (drain, flush & refill)
Every 100,000 miTransmission 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 1986 Cadillac Fleetwood occupies an early position in its generation, and the federal data—while limited to later model years—reveals a broader trend of escalating complaints and recalls as the platform aged, peaking in 1993 with 46 complaints and 3 recalls. The 1986 model’s reported issues (2 electrical system complaints, 2 fire-related incidents, and 1 crash complaint) are modest in absolute terms, but the presence of fire complaints is notable given their severity. Compared to later years, the 1986 Fleetwood appears to have fewer documented problems, though this may reflect lower reporting rates for older vehicles rather than inherent reliability. The data doesn’t specify root causes, but the electrical and fuel system complaints align with common vintage Cadillac vulnerabilities. Given its position in the generation’s arc—before the spike in complaints and recalls—1986 emerges as a relatively stable year, though buyers should prioritize a thorough inspection of electrical and fuel systems. **Takeaway: This is one of the better years to buy within the generation, provided a pre-purchase diagnostic confirms no latent fire or electrical risks.**

5
Open recalls
NHTSA campaigns
0
Service bulletins
Manufacturer communications
4
ODI investigations
Office of Defects Investigation
7
Owner complaints
1 involved a crash · 2 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

Owner complaints filed with NHTSA, by component

All 7 complaints on record, top 6 components.

Electrical System2
Fuel System, Gasoline,Electrical System,Seat Belts,Vehicle Speed Control1
Visibility1
Engine & Engine Cooling1
Wheels1
Fuel System, Gasoline1

Source: NHTSA Office of Defects Investigation complaint database.

Recalls NHTSA · verified

Showing 2 of 5 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…

90V093000Equipment:Other:LabelsReported 09/05/1990

VEHICLE DESCRIPTION: LIMOUSINES BUILT BY EMPIRE COACH. VEHICLE ALTERERS LABEL MAY BE MISSING OR INCOMPLETE. Remedy: ADD COMPLIANCE LABEL.

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 Fleetwood. 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.

Reference guides

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

Frequently asked

How much oil does the 1986 Fleetwood take?

4.5 qt of ABOVE 40 degrees F: 30, ABOVE 20 degrees F: 20W-20, ABOVE 10 degrees F: 15W-40, ABOVE 0 degrees F: 10W-30,, per the factory manual.

Does the 1986 Fleetwood have open recalls?

NHTSA lists 5 recall campaign(s) for this model year. Check your specific vehicle by VIN.

What gas mileage does the Fleetwood get?

EPA figures are 16 city / 23 highway / 19 combined mpg.