2023 Jeep Gladiator 3.0L Diesel Maintenance Guide: Oil, Filters & Fluids

AMSOIL diesel oil guide for 2023 Jeep Gladiator
AMSOIL diesel oil guide for trucks, vans, SUVs and diesel engines

What oil does a 2023 Jeep Gladiator 3.0L Diesel take?

The 2023 Jeep Gladiator with the 3.0L 6-cylinder Engine Code [M] EXJ M Diesel Turbo requires an oil viscosity of 5W-40 for all temperatures. The engine oil capacity is 9 quarts when performing a service with a filter change. AMSOIL recommends using AMSOIL 5W-40 FS 100% Synthetic European Motor Oil (EFMQT-EA) for this application.

AMSOIL product recommendations

Based on the AMSOIL lookup data, here are the recommended products for your 3.0L Diesel Jeep Gladiator:

Engine Oil & Filter

Product Name Part Code
AMSOIL 5W-40 FS 100% Synthetic European Motor Oil EFMQT-EA
WIX Oil Filter WL10614-EA

Coolant & Brake Fluid

Product Name Part Code
AMSOIL Passenger Car & Light Truck Antifreeze & Coolant ANTPC1G-EA
AMSOIL Propylene Glycol Antifreeze and Engine Coolant ANT1G-EA
AMSOIL DOT 3 and DOT 4 100% Synthetic Brake Fluid BFLVCN-EA

Transmission & Transfer Case

Product Name Part Code
AMSOIL Signature Series Fuel-Efficient ATF ATLPK-EA
AMSOIL OE Fuel-Efficient ATF OTLQT-EA
AMSOIL Signature Series Multi-Vehicle ATF ATFPK-EA
AMSOIL OE Multi-Vehicle ATF OTFQT-EA

Engine Oil Specifications & Details

Proper lubrication is critical for the 3.0L Diesel Turbo engine to manage soot and heat effectively.

Oil Viscosity and Capacity

Specification Value
AMSOIL lookup oil grade SEO50
Viscosity 5W-40 (All TEMPS)
Capacity (with filter) 9 quarts

Note: After refilling, always check the oil level. The oil drain plug torque specification is 33 ft/lbs.

Oil Filter Information

The AMSOIL lookup recommends a WIX Oil Filter (WL10614-EA). This premium media is designed to help reduce engine wear and offers OEM drain intervals.

Transmission & Driveline Fluids

The 2023 Jeep Gladiator uses specific transmission configurations that require precise fluid types.

Automatic Transmission (8HP75)

Detail Specification
Transmission Model 8HP75 (SL076)
Total Fill Capacity 9.5 quarts

Manual Transmission (AL6 6-SPD)

Detail Specification
Transmission Model AL6 (6-SPD AP4 All TEMPS)
Capacity 4.6 pints

Transfer Case Lubricant

For the MP3022C transfer case, the capacity is 3.8 pints. Fill the transfer case to the bottom edge of the fill plug opening. The drain and fill plug torque specification is 21 ft/lbs.

Cooling System Specifications

Maintaining proper engine temperature is vital for diesel longevity.

Detail Value
Total Capacity 14.5 quarts

AMSOIL offers two options: a 50/50 pre-mix (ANTPC1G-EA) and a concentrated propylene glycol version (ANT1G-EA) which requires mixing with distilled or high-quality water.

Diesel maintenance notes for this vehicle

  • Oil Management: Diesel engines require monitoring for soot accumulation; adhere to strict oil change intervals.
  • Fuel Filtration: Maintaining high-quality fuel filtration is essential to prevent injector issues.
  • Emissions: Ensure the use of appropriate fluids that do not harm emissions systems.
  • Fluid Checks: Always verify levels after a refill, especially for engine oil and transfer case fluids.

Common diesel oil-related concerns and how AMSOIL products may help

Concern Why it matters AMSOIL product How it may help Limitation
Soot Accumulation Can degrade oil quality and cause wear. EFMQT-EA Designed for unique diesel demands. Requires regular intervals.
Heavy Towing/Heat Increases transmission and engine stress. ATFPK-EA Withstands rigors of heavy towing and elevated temps. Diagnosis may be needed for mechanical failure.
Cold Starts Increases wear during initial lubrication. ATFPK-EA Remains fluid in sub-zero temperatures. Not a substitute for warm-up.

Common maintenance concerns for this vehicle

Based on owner reports and technical data, owners should be aware of the following:

  • Fuel System: Monitoring high-pressure fuel pump (HPFP) performance is important.
  • Driveline: Owners have reported issues regarding transfer cases and output shafts in some instances; regular inspection of driveline components is advised.
  • Electrical/Network: Some reports indicate complex electrical communication issues across control modules.

Recall, TSB, and manufacturer communication notes

The following NHTSA recall information has been identified for the 2023 Jeep Gladiator. Always verify your specific vehicle’s status using your VIN at the official NHTSA or Jeep website.

  • Clutch Assembly (Campaign 23V116000): Certain manual transmission models may have a clutch pressure plate that could overheat and fracture, increasing fire risk.
  • Fuel Pump (Campaign 23V263000): The high-pressure fuel pump (HPFP) on the 3.0L diesel engine may fail, potentially causing an engine stall.
  • Rear Visibility (Campaign 23V641000): Some manual transmission vehicles may experience rearview camera or reverse light failures.

About this vehicle

The 2023 Jeep Gladiator represents the modern iteration of Jeep’s pickup truck lineage, specifically the JT generation. Unlike the historical SJ series produced between 1962 and 1988, the current Gladiator is a mid-size pickup built upon the same platform as the Wrangler JL. This shared architecture provides a foundation known for off-road capability and ruggedness, distinguishing it from standard light-duty pickups.

The specific configuration researched features a 3.0L 6-cylinder diesel engine (Engine Code M Exj M Diesel Turbo). As part of the Jeep product lineup under Stellantis, this vehicle bridges the gap between traditional SUV utility and open-bed cargo functionality. Diesel engines in this class are typically utilized for increased towing capacity and fuel efficiency during long-distance hauling or off-road excursions, making them a popular choice for owners who require more torque than standard gasoline counterparts.

From a maintenance perspective, diesel owners should focus on specialized requirements that differ from gasoline models. This includes monitoring diesel exhaust fluid (DEF) levels if applicable, maintaining high-quality fuel filtration to prevent injector issues, and adhering to strict oil change intervals to manage soot accumulation. Because this vehicle is built on a platform shared with the Wrangler, many chassis and suspension components may have commonality, but engine-specific maintenance remains critical.

Note: Specific technical performance metrics such as precise horsepower or torque ratings should be verified through official manufacturer documentation.

Common questions about this vehicle’s diesel oil and maintenance

How much oil does my 2023 Jeep Gladiator 3.0L Diesel take?

It takes 9 quarts of oil with a filter change. Always check the level after refilling.

What is the correct oil viscosity for this engine?

The AMSOIL lookup specifies 5W-40 (All TEMPS) for the 3.0L Diesel Engine Code [M].

Can I use a different transmission fluid for my automatic Gladiator?

For the 8HP75 automatic transmission, AMSOIL lists ATFPK-EA and OTLQT-EA as options.

What should I do if there is a recall on my diesel engine?

If you are part of the HPFP fuel pump recall (Campaign 23V263000), contact a dealer for a free replacement. Verify your VIN immediately.

How often should I change my diesel oil?

While specific intervals vary, diesel owners must manage soot accumulation by adhering to strict maintenance schedules and using high-quality synthetic oils like EFMQT-EA.

Does the transfer case require special fluid?

Yes, for the MP3022C transfer case, use a suitable lubricant and fill to the bottom edge of the fill plug opening. The torque spec is 21 ft/lbs.


Disclaimer: This information is derived from provided AMSOIL and NHTSA data. Always consult your owner’s manual or a certified technician before performing maintenance.

Scroll to Top