JeepGrand Wagoneer1988Overview/jeep/grand-wagoneer/1988/base/

1988 Jeep Grand Wagoneer

Factory specifications, fluid capacities, torque values, EPA fuel economy and the federal safety record for the 1988 Grand Wagoneer.

Transmission Automatic 3-spd

The 1988 Grand Wagoneer uses a 4‑quart oil capacity with a filter and calls for 20W‑40, 20W‑50 or 10W‑30 API oil, is paired with an Automatic 3‑speed transmission, and carries EPA fuel‑economy ratings of 10/12/11 mpg. Its power‑train has generated only three owner complaints overall, with the sole complaint area listed as Power Train and a single recall recorded. The vehicle’s complaint history spans model years 1990 through 2026, a period that begins after the 1988 model year, and within that span complaints rose to a high of 55 in 2022 while the earliest year, 1991, recorded just one complaint. Consequently, the 1988 model year represents an early, relatively low‑complaint chapter in the Wagoneer’s long‑term reliability record.

Model year202520242023202219931991199019891988

Quick specs

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

Engine oil capacity4 qt w/ filterOEM · verified
Engine oil type20W-40 / 20W-50 / 10W-30 APIOEM · verified
EPA fuel economy10/12/11 mpgEPA · verified

Full specifications

Engine, drivetrain, dimensions and economy.

Engine & drivetrain NHTSA vPIC

TransmissionAutomatic 3-spd

Dimensions & weight NHTSA vPIC

Overall length186.2 in
Overall width74.8 in
Overall height66.5 in
Wheelbase108.7 in
Curb weight4497 lb

Ratings & economy EPA / vPIC

EPA city / highway / combined10 / 12 / 11 mpg
Drivetrain4-Wheel or All-Wheel Drive
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 Grand Wagoneer of this era, listed by trim and engine — this page spans more than one engine, so no single horsepower figure is shown.

13.3 sec0–60 mph (tested)quickest 13.30 sec — 1990 5-door
YearTrim / engine0–60¼ mileHPDrivetrain
19905-door 5.9L V813.30 sec19.20 sec144 hp4x4

Service quick specs OEM factory data

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

This engine holds 4 qt w/ filter of 20W-40 / 20W-50 / 10W-30 API engine oil, Front: 75W- in the differential.

Lubricants & capacities

Differential Gear OilFront: 75W-
Differential Gear Oil Capacity4.8 Pints
Engine CoolantETHYLENE GLYCOL
Engine Oil20W-40 · 20W-50 · API · 10W-30 · 10W-40 · 5W-30
Engine Oil Capacity4 qt w/ filter
Power Steering FluidMS-5931

Factory maintenance schedule OEM · verified

Normal service, condensed from the factory interval matrix.

Under the factory schedule, replace the engine oil and filter every 7,500 mi; spark plugs every 52,500 mi; coolant every 22,500 mi. The big-interval services (every 22,500 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 7,500 miCV Joint Boot (inspect) · Driveshaft U-Joint (lubricate) · Engine Oil (drain & refill) · Engine Oil Filter (replace) · Exhaust System (Complete) (inspect) · Steering Gear Box Assembly (inspect)
Every 15,000 miAccessory Drive Belt (inspect) · Battery (inspect electrolyte level) · Engine Air Filter Element (replace)
Every 22,500 miEngine Coolant System (drain, flush & refill)
Every 30,000 miAir Cleaner Manifold Heat Control Actuator (inspect) · Bands (adjust) · Body Latches, Locks & Hinges (inspect) · Brake System (inspect) · Choke System (inspect) · Differential (inspect fluid level)
Every 52,500 miEmission Control System (inspect) · Fuel Tank Filler Cap (inspect) · Ignition Timing (inspect) · Spark Plug Wires (replace) · Vacuum Line (inspect)

Owner how-tos

Condensed service procedures for routine maintenance. Procedures that require dealer diagnostic equipment are identified and summarized only.

Common procedures

Key fob — remote (RKE) programming programming new fob buttons Dealer tool OEM · verified
Tool requiredDRBIII scan tool (dealer / locksmith)
WhyTransmitter codes are written into the receiver in the passenger door module
Anti-theft (SKIS) — module initialization after immobilizer module replacement Dealer tool OEM · verified
When neededAfter Sentry Key Immobilizer Module (SKIM) replacement
Tool requiredDRBIII scan tool
Also requiredThe vehicle's four-digit PIN code

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 1988 model year predates the federal record's 1990 commencement, yet its specific complaint profile—single filings in Power Train, Fuel System Gasoline, and Fuel System Other, with zero crash or fire incidents—aligns precisely with the minimal regulatory activity observed in 1990-1992, when annual complaints ranged from one to two and recalls were nonexistent. This positions 1988 at the genesis of a generation-wide arc that remained quiet until a 1993 spike to nine complaints and seven recalls, followed by moderate volatility through 1999 and an eventual surge to 55 complaints and nine recalls by 2022, moderating to 33 complaints and six recalls by 2024. The data does not specify root causes for the 1988 powertrain or fuel system complaints, but the absence of safety-critical reports distinguishes it from later high-activity years. With federal filings at their lowest ebb and no fire or crash complaints documented, 1988 represents a statistically favorable acquisition target within this generation's lifecycle, provided individual vehicle condition validates the clean regulatory footprint.

1
Open recalls
NHTSA campaigns
2
Service bulletins
Manufacturer communications
0
ODI investigations
Office of Defects Investigation
3
Owner complaints
0 involved a crash · 0 a fire
Owner complaints by model year NHTSA · this generation & adjacent

Owner complaints filed with NHTSA, by component

All 3 complaints on record, top 3 components.

Power Train1
Fuel System, Gasoline1
Fuel System, Other1

Source: NHTSA Office of Defects Investigation complaint database.

Recalls NHTSA · verified

Showing 1 of 1 campaigns on record for this vehicle.

87V178000Visibility:Glass, Side/RearReported 23/11/1987

THE KEY OPERATED TAILGATE WINDOW WILL CONTINUE TO CLOSE IF THE SPRING LOADED KEY DOES NOT RETURN TO OFF POSITION WHEN RELEASED. Remedy: OWNERS SHOULD NOT LEAVE KEY IN TAILGATE OF UNATTENDED VEHICLE. REPAIR MECHANISM TO ASSURE PROPER KEY RETURN OPERATION.

Technical service bulletins NHTSA · verified

Showing 2 of 2 bulletins on record with NHTSA.

BulletinDateComponentSummary
RCL/6231995-05-01Electrical SystemUNKNOWN
RCL/6221995-05-01Electrical SystemUNKNOWN

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 Grand Wagoneer. 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 1988 Grand Wagoneer take?

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

Does the 1988 Grand Wagoneer have open recalls?

NHTSA lists 1 recall campaign(s) for this model year. Check your specific vehicle by VIN.

What gas mileage does the Grand Wagoneer get?

EPA figures are 10 city / 12 highway / 11 combined mpg.