What oil does a 1987 Jeep Comanche 2.1L Diesel Turbo take?
For the 1987 Jeep Comanche with the 2.1L 4-cylinder Engine Code [B] B Diesel Turbo, the recommended oil viscosity depends on ambient temperature: 10W-30 is used for -23 to 38°C, 15W-40 for above -7°C, 20W-40/20W-50 for above -1°C, and 5W-30 for below 10°C. The oil capacity is 5.5 quarts with a filter change. AMSOIL recommends the Signature Series 10W-30 or 5W-30 Max-Duty Diesel Oil.
AMSOIL product recommendations
Based on the vehicle specifications, the following AMSOIL products are recommended for your diesel maintenance needs:
Engine Oil Recommendations
| Product Name | Viscosity | Part Code |
|---|---|---|
| AMSOIL Signature Series Max-Duty Diesel Oil | 10W-30 | DTTQT-EA |
| AMSOIL 10W-30 Heavy-Duty Diesel Oil | 10W-30 | ADNQT-EA |
| AMSOIL Signature Series Max-Duty Diesel Oil | 5W-30 | DHDQT-EA |
Oil Specification: CH-4
Filter & Coolant Recommendations
| Component | Product Name | Part Code |
|---|---|---|
| Oil Filter | WIX Oil Filter | 51626-EA |
| Antifreeze | Passenger Car & Light Truck Antifreeze | ANTPC1G-EA |
| Antifreeze | Propylene Glycol Antifreeze/Coolant | ANT1G-EA |
Transmission Fluid Recommendations
| Product Name | Part Code |
|---|---|
| Signature Series Multi-Vehicle ATF | ATFPK-EA |
| OE Multi-Vehicle ATF | OTFQT-EA |
| Torque-Drive® Synthetic ATF | ATD1G-EA |
Engine Oil Specifications and Details
What is the oil capacity for a 1987 Jeep Comanche Diesel?
The engine requires 5.5 quarts of oil when performing a service that includes a filter change. It is important to check the oil level after refilling to ensure accuracy.
Engine Oil Viscosity Guide
| Temperature Range | Recommended Viscosity |
|---|---|
| Below 10°C | 5W-30 |
| -23 to 38°C | 10W-30 |
| Above -7°C | 15W-40 |
| Above -1°C | 20W-40, 20W-50 |
Oil Grade: CH-4
Automatic Transmission Fluid (AW4) Details
How much transmission fluid does the AW4 require?
For the 4-speed AW4 automatic transmission, the total fill capacity is 8.5 quarts. If you are performing an initial fill, the required amount is 4.2 quarts.
Maintenance Overview
Cooling System Maintenance
The cooling system has a capacity of 9 quarts. AMSOIL offers two primary options: a 50/50 pre-mix ethylene glycol formulation (ANTPC1G-EA) and a concentrated propylene glycol formulation (ANT1G-EA) that requires mixing with distilled or high-quality water.
Manual Transmission Details
For the AX5 (4WD) manual transmission, the required specification is GL-5 at all temperatures using 75W-90. Capacities vary between 7 pints and 7.4 pints depending on specific application details.
Common diesel oil-related concerns and how AMSOIL products may help
| Concern | Why it matters | AMSOIL product from this lookup | How it may help | Important limitation |
|---|---|---|---|---|
| Extreme Temperatures | Affects viscosity and engine starting. | Signature Series 5W-30 / 10W-30 | Excels in extreme temperatures; maintains proper thickness. | Must match temperature-specific viscosity needs. |
| Engine Wear | Diesel engines face high pressure. | Signature Series Diesel Oil | Delivers up to 6X more wear protection. | Requires regular maintenance intervals. |
| Fuel Efficiency | Operational costs for diesel users. | Signature Series Diesel Oil | Designed to maximize fuel efficiency. | Results depend on overall vehicle condition. |
| Sludge & Varnish | Can clog transmission components. | Torque-Drive® ATF | Combats sludge and varnish formation. | Does not repair existing mechanical damage. |
Common maintenance concerns for this vehicle
Based on owner reports and historical data, owners of the 1987 Jeep Comanche should monitor several key areas:
- Engine Cooling: Some users have reported overheating issues potentially related to water pump failure.
- Braking Systems: Reports indicate concerns regarding power brake assist and stopping distances.
- Steering: Potential for steering wheel misalignment or box cracking has been noted in owner complaints.
- Fuel Delivery: Older diesel systems require careful attention to fuel filtration and delivery line integrity.
Recall, TSB, and manufacturer communication notes
NHTSA recall research for the 1987 Jeep Comanche identified several campaigns:
Note: These are summaries of official records. Owners should always verify open recalls by VIN through an authorized dealer or the NHTSA website.
About this vehicle
The 1987 Jeep Comanche (MJ) represents a unique era in Jeep’s history, serving as the compact pickup truck variant of the highly successful Cherokee (XJ) compact SUV. The Comanche was manufactured between 1986 and 1992 and was available in both rear-wheel drive (RWD) and four-wheel drive (4WD) configurations, offering various cargo bed lengths including six-foot and seven-foot options.
From a mechanical perspective, the Comanche shares its fundamental design DNA with the Cherokee XJ. This shared lineage means that many structural and suspension components may be interchangeable or similar to those found on the XJ platform. For owners of a diesel variant, maintenance context shifts significantly compared to the standard gasoline models. Diesel engines from this era often require specialized attention regarding fuel filtration, glow plug operation, and turbocharger health.
Because these vehicles were built during a transitional period for Jeep (moving from AMC ownership to Chrysler acquisition in 1987), parts availability may vary depending on whether components are specific to the AMC-era design or later Chrysler-integrated updates. Typical use cases include light-duty utility work, off-road exploration, and small-scale hauling. Given the age of the vehicle, preventative maintenance focusing on cooling systems, rubber seals, and fuel delivery is critical to longevity.
Common questions about this vehicle’s diesel oil and maintenance
How much oil does my 2.1L Diesel Turbo take?
It takes 5.5 quarts of oil including the filter change. Always check the level after refilling.
What is the best viscosity for cold weather?
For temperatures below 10°C, AMSOIL recommends using a 5W-30 viscosity.
Can I use standard gasoline oil in my diesel engine?
No, this engine requires diesel-specific oil such as the CH-4 grade products listed in the AMSOIL lookup.
How often should I change my transmission fluid?
While specific intervals aren’t provided, using high-quality fluids like ATD1G-EA can help provide long oil life and combat sludge.
What should I do about a potential fuel leak?
If you suspect a leak, check the intake manifold area for studs that may be chafing fuel hoses, as noted in NHTSA recall 86V160000.
How can I verify if my Jeep has an open recall?
You should always use your specific Vehicle Identification Number (VIN) to check for active recalls via the NHTSA website or a Jeep dealership.
Disclaimer: Not all information provided is verified by the manufacturer. Always consult your owner’s manual and verify all specifications with a professional mechanic before performing maintenance.