AMSOIL Product Recommendations
To simplify your maintenance, AMSOIL provides high-performance synthetic fluids and filters specifically selected for the 3.0L diesel engine requirements.
Engine Oil & Filter
| Product Name | Part Code |
|---|---|
| AMSOIL 5W-40 FS 100% Synthetic European Motor Oil | EFMQT-EA |
| WIX Oil Filter | WL10614-EA |
Automatic Transmission Fluid (ATF)
| Product Name | Part Code |
|---|---|
| AMSOIL Signature Series Fuel-Efficient 100% Synthetic ATF | ATLPK-EA |
| AMSOIL OE Fuel-Efficient 100% Synthetic ATF | OTLQT-EA |
| AMSOIL Signature Series Multi-Vehicle 100% Synthetic ATF | ATFPK-EA |
| AMSOIL OE Multi-Vehicle 100% Synthetic ATF | OTFQT-EA |
Coolant & Brake Fluid
| Product Name | Part Code |
|---|---|
| AMSOIL Passenger Car & Light Truck Antifreeze/Coolant | ANTPC1G-EA |
| AMSOIL Propylene Glycol Antifreeze/Coolant | ANT1G-EA |
| AMSOIL DOT 3 and DOT 4 100% Synthetic Brake Fluid | BFLVCN-EA |
Transfer Case Lubricant
| Product Name | Part Code |
|---|---|
| AMSOIL Signature Series Multi-Vehicle 100% Synthetic ATF | ATFPK-EA |
Quick Answer: What oil does the 2021 Jeep Gladiator 3.0L Diesel take?
The 2021 Jeep Gladiator with the 3.0L 6-cylinder diesel engine (Engine Code [M] EXJ M) requires a total capacity of 9 quarts of oil when changing with a filter. The recommended viscosity is 5W-40. AMSOIL recommends using AMSOIL 5W-40 FS 100% Synthetic European Motor Oil (Code: EFMQT-EA) paired with a WIX Oil Filter (Code: WL10614-EA).
Engine Oil Specifications & Details
Proper lubrication is critical for the longevity of the 3.0L diesel turbo engine. Below are the confirmed technical specifications for your oil service.
Oil Viscosity and Capacity
| Specification | Value |
|---|---|
| Viscosity | 5W-40 (All TEMPS) |
| Capacity (with filter) | 9 quarts |
| AMSOIL Lookup Oil Grade | SEO50 |
Service Torque Specifications
| Component | Torque Value |
|---|---|
| Oil Drain Plug | 33 ft/lbs |
Note: After refilling, always check the oil level.
Transmission & Drivetrain Specifications
Automatic Transmission Details
For vehicles equipped with the 8HP75 transmission:
| Specification | Value |
|---|---|
| Transmission Model | 8 speed 8HP75 |
| Total Fill Capacity | 9.5 quarts |
Transfer Case Details
For Transfer Case MP3022C (AP4):
| Specification | Value |
|---|---|
| Capacity | 3.8 pints |
| Fill Plug Torque | 21 ft/lbs |
| Drain Plug Torque | 21 ft/lbs |
Note: Fill transfer case to the bottom edge of the fill plug opening.
Cooling System Specifications
| Component | Capacity |
|---|---|
| Engine Coolant | 12 quarts |
Diesel maintenance notes for this vehicle
Maintaining a modern turbo-diesel engine like the 3.0L in your Jeep Gladiator requires specific attention to detail:
- Fuel Quality: Diesel engines require high-quality fuel and regular fuel filter replacements to protect sensitive components.
- Emissions Systems: Monitor the Diesel Particulate Filter (DPF) systems, which are common in modern turbo-diesel engines.
- Drivetrain Checks: Because this vehicle is built on a rugged chassis for off-road use, regular inspections of suspension bushings and cooling systems are recommended.
Common diesel oil-related concerns and how AMSOIL products may help
| Concern | Why it matters | AMSOIL Product | How it may help | Limitation |
|---|---|---|---|---|
| Turbocharger Protection | High heat and speed can degrade oil. | EFMQT-EA | Provides exceptional engine protection. | Requires proper service intervals. |
| Heavy Towing/Terrain | Increases transmission and transfer case heat. | ATLPK-EA | Withstands rigors of heavy towing and elevated temperatures. | Diagnosis required for mechanical failure. |
| Cooling System Corrosion | Protects metals, gaskets, and hoses. | ANTPC1G-EA | Protects all cooling system metals and gaskets. | Check for leaks regularly. |
Common maintenance concerns for this vehicle
Based on owner reports and research, owners of the 2021 Jeep Gladiator should be aware of the following:
- Fuel System Integrity: There have been documented recalls regarding high-pressure fuel pump (HPFP) failures in 3.0L diesel engines which may cause engine stalls.
- Transmission/Clutch Performance: Some owners have reported issues related to transmission software or clutch assembly components.
- Electrical/Visibility: Software errors can occasionally affect rearview camera displays.
Recall, TSB, and manufacturer communication notes
NHTSA research indicates several important recalls for the 2021 Jeep Gladiator:
- Fuel System (Campaign 22V767000): The high-pressure fuel pump (HPFP) may fail, potentially causing an engine stall.
- Clutch Assembly (Campaign 21V028000): Certain manual transmission models may have a clutch pressure plate that could overheat and fracture.
- Rearview Camera (Campaign 22V638000): A radio software error may prevent the rearview image from displaying.
Important: Always verify your specific vehicle’s open recalls by contacting a dealer with your VIN.
About this vehicle
The 2021 Jeep Gladiator represents a modern revival of the classic Gladiator nameplate, originally used for full-size pickup trucks between 1962 and 1988. This current generation (JT) is a mid-size pickup built on the same platform as the Jeep Wrangler JL, designed to bridge the gap between a rugged off-road vehicle and a functional utility pickup.
The specific model under discussion features the 3.0L 6-cylinder diesel engine (Engine Code M EXJ M Diesel Turbo). This powertrain is part of Jeep’s specialized offerings for owners who require higher torque or improved fuel efficiency compared to standard gasoline engines. Because this vehicle is designed for both recreational trail use and light-duty hauling, maintenance often involves monitoring components subjected to strenuous environments, such as the drivetrain and cooling systems.
Owners of this diesel variant should prioritize high-quality lubrication and filtration to manage the unique demands of a turbo-diesel engine, especially when used for towing or off-road excursions.
Common questions about this vehicle’s diesel oil and maintenance
How much oil does my 3.0L Diesel Gladiator take?
It takes 9 quarts of oil with a filter change.
What is the correct oil viscosity for the 2021 Jeep Gladiator Diesel?
The confirmed viscosity is 5W-40.
Can I use AMSOIL for my transfer case?
Yes, the AMSOIL lookup lists ATFPK-EA for the transfer case application.
What is the torque spec for my oil drain plug?
The oil drain plug should be torqued to 33 ft/lbs.
Does my Jeep need special coolant?
The AMSOIL lookup lists ANTPC1G-EA for this application, which is an OAT formulation.
How do I check for recalls on my Gladiator?
You should contact a Jeep dealer or use the NHTSA website to check your specific VIN for any open manufacturer communications or recalls.
Disclaimer: This information is derived from provided source data. Always consult your owner’s manual and verify with a professional mechanic before performing vehicle maintenance.