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1991 Dodge Ram 50

Factory specifications, fluid capacities, torque values, EPA fuel economy and the federal safety record for the 1991 Ram 50.

The 1991 Dodge Ram 50 is maintained with 3.7 quarts of engine oil, accepting API-rated 10W-30, 10W-40, or 10W-50 viscosity grades for proper lubrication across operating conditions. Reliability data for this model year is notably thin, with only 2 total owner complaints on record—centered primarily on the Structure category—alongside a single recall. That low complaint volume places the 1991 Ram 50 on the quieter end of the model's reliability history, though the structural focus of those complaints and the accompanying recall are worth noting for anyone evaluating long-term ownership.

Model year1991 1990 1989 1988 1987 1986 1985 1984 1983

Quick specs

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

Engine oil capacity3.7 qtOEM · verified

Engine oil type10W-30 / 10W-40 / 10W-50 APIOEM · verified

Full specifications

Engine, drivetrain, dimensions and economy.

Dimensions & weight NHTSA vPIC

Overall length	193.7 in
Overall width	65.4 in
Overall height	61 in
Wheelbase	116.1 in
Curb weight	2696 lb

Service quick specs OEM factory data

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

This engine holds 3.7 qt of 10W-30 / 10W-40 / 10W-50 API engine oil, 85W-90 · 80W-90 · GL-5 in the differential, DOT 3 brake fluid.

Lubricants & capacities

Brake Fluid	DOT 3
Differential Gear Oil	85W-90 · 80W-90 · GL-5
Differential Gear Oil Capacity	3.5 Pints,
Engine Oil	API · 10W-30 · 10W-40 · 10W-50 · 50W-30 · 5W-50
Engine Oil Capacity	3.7 qt
Engine Oil Capacity	4 qt w/ filter
Engine Oil	API · 10W-30 · 10W-40 · 10W-50 · 50W-30 · 5W-50
Engine Oil Capacity	5.2 qt w/ filter

Ignition

Curb Idle Speed (No Load)	700 rpm
Curb Idle Speed Variance (No Load)	100 rpm

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 60,000 mi.

Every 7,500 mi	Body Latches, Locks & Hinges (inspect) · Brake Hydraulic System (inspect fluid level) · Engine Oil (drain & refill) · Power Steering System (inspect) · Weatherstrip Seal (inspect)
Every 15,000 mi	Axle Shaft Oil Seal (inspect) · CV Joint Boot (inspect) · Engine Oil Filter (replace)
Every 30,000 mi	Accessory Drive Belt (inspect) · Brake Linings (inspect) · Differential (inspect fluid level) · Drive Axle Assembly (drain & refill) · Driveshaft U-Joint (inspect) · Engine Air Filter Element (replace)
Every 50,000 mi	EGR Valve (replace) · Fuel Filter (replace) · Fuel Line (inspect) · Fuel Tank (inspect) · Fuel Tank Filler Cap (inspect)
Every 60,000 mi	Distributor Cap (inspect) · Distributor Rotor (inspect) · Distributor Vacuum Advance (inspect) · Fuel Evaporative Emission Control System (inspect) · Spark Plug Wires (inspect) · Vacuum Line (inspect)
Every 80,000 mi	Oxygen Sensor (inspect) · PCV System (inspect)
Every 100,000 mi	Fuel Evaporative Canister (replace)

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 required	DRBIII scan tool (dealer / locksmith)
Why	Transmitter 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 needed	After Sentry Key Immobilizer Module (SKIM) replacement
Tool required	DRBIII scan tool
Also required	The 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 1991 Dodge Ram 50 shows a federal record of 2 complaints, 1 recall, and 1 TSB, representing a 50 percent reduction in complaints compared to the 4 complaints logged for the 1990 model year while maintaining the same volume of recalls and technical service bulletins. Across this brief two-year generation snapshot, the complaint trend improves from 1990 to 1991, suggesting the target year benefits from early manufacturing corrections. For the 1991 model specifically, the two complaints are isolated to the Structure and Service Brakes, Hydraulic categories, with zero crash or fire incidents reported; however, the data does not specify the root causes for these issues. Given its position at the lower end of the complaint arc and the absence of severe safety incidents, the 1991 model is a favorable year to buy relative to its predecessor, provided you thoroughly inspect the vehicle's structural integrity and hydraulic braking system.

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 2 complaints on record, top 2 components.

Structure1

Service Brakes, Hydraulic1

Source: NHTSA Office of Defects Investigation complaint database.

Recalls NHTSA · verified

Showing 1 of 1 campaigns on record for this vehicle.

95V103003Seat Belts:Front:Buckle AssemblyReported 24/05/1995

THE FRONT SAFETY BELT BUCKLE RELEASE BUTTONS CAN BREAK. THESE RED PLASTIC RELEASE BUTTONS ARE MARKED "PRESS." IF A BUTTON BREAKS, PIECES CAN FALL INTO THE BUCKLE ASSEMBLY CAUSING THE BUCKLE TO OPERATE IMPROPERLY. Remedy: OWNERS SHOULD PROMPTLY CHECK THE CONDITION AND OPERATION OF BOTH FRONT SAFETY BELT BUCKLES AND CAREFULLY INSPECT THE RED RELEASE BUTTON FOR ANY BREAKS OR CRACKS. THEY SHOULD…

Technical service bulletins NHTSA · verified

Showing 1 of 1 bulletins on record with NHTSA.

Bulletin	Date	Component	Summary
9002688	2013-02-13	Engine And Engine Cooling	68069384A$, R8069384A$, 68086182A$, R8027067A$, RL002012A$ - Gasket, Cylinder Head Cover…

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 Ram 50. 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 3.7 qt

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 1991 Ram 50 take?

3.7 qt of ABOVE 32 degrees F: 20W API ABOVE -10 degrees F: 10W-30 API, 10W-40 API,10W-50 API, ABOVE 60 degrees F 50W-30 API, 5W-50 API, per the factory manual.

Does the 1991 Ram 50 have open recalls?

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