Changing the oil in your late model Jeep Wrangler JL with the 3.6L Pentastar V6 gas engine is a straightforward DIY maintenance task that can save you money and ensure your vehicle runs smoothly. Regular oil changes help prevent engine wear, improve fuel efficiency, and maintain warranty compliance. This guide assumes a stock setup; if your Wrangler has aftermarket modifications like skid plates, you may need additional steps to access components. Always consult your owner’s manual for model-specific details, and work in a well-ventilated area on a level surface. Safety first: Wear gloves and eye protection, and dispose of used oil responsibly at a recycling center.
Tools and Materials Required
- 6 quarts of SAE 0W-20 full synthetic motor oil (recommended; some sources suggest 5W-20 or 5W-30 for older JLs or hotter climates, but stick to 0W-20 for optimal performance)
- Oil filter (Mopar 68191349AC or equivalent)
- Oil filter cap wrench or 24mm socket (for the filter housing cap)
- 13mm socket or wrench (for the drain plug; some models use 1/2-inch)
- Ratchet and extension
- Oil drain pan (at least 7-quart capacity)
- Funnel
- Rags or paper towels
- Torque wrench (optional, for precise tightening)
- Jack and jack stands (if ground clearance is insufficient; Wranglers often have enough without lifting)
- New drain plug washer/gasket (if not reusable)
Estimated Time
30-60 minutes, depending on experience and access. Allow extra time for cleanup and if you’re lifting the vehicle.
Recommended Oil
For the 3.6L gas engine in 2018+ Jeep Wrangler JL models, use SAE 0W-20 full synthetic oil that meets API SP/GF-6 standards. Brands like Mopar MaxPro, Pennzoil Platinum, or Mobil 1 are commonly recommended for their compatibility and performance in varying temperatures. Capacity is 6 quarts. Avoid conventional oil, as synthetic provides better protection for the Pentastar engine’s high-revving nature.
Step-by-Step Instructions
- Prepare the Vehicle: Park on a flat surface and let the engine run for 5-10 minutes to warm the oil (this helps it drain faster). Turn off the engine, engage the parking brake, and pop the hood. Locate the oil filler cap (yellow, on the valve cover) and remove it to allow air flow during draining.
- Access the Underside: Slide under the vehicle (or jack it up safely if needed). Locate the oil pan drain plug on the bottom of the engine (driver’s side, toward the rear). Position your drain pan underneath.
- Drain the Old Oil: Using a 13mm wrench or socket, loosen and remove the drain plug (turn counterclockwise). Let the oil drain completely (10-15 minutes). Inspect the plug and washer for damage; replace the washer if worn. Wipe the area clean.
- Remove the Oil Filter: Back under the hood, locate the oil filter housing (black cap, front-center of the engine bay). Use a 24mm socket or filter wrench to loosen the cap (counterclockwise). Remove the cap and old filter (it may drip oil, so have rags ready). Drain any excess oil from the housing. Insert the new filter (lubricate the O-ring with new oil first), then reinstall the cap and torque to about 18 ft-lbs.
- Reinstall the Drain Plug: Screw the drain plug back in by hand, then tighten with the wrench (torque to 20 ft-lbs if using a torque wrench to avoid stripping).
- Add New Oil: Using a funnel, pour in about 5 quarts of new oil through the filler neck. Wait a few minutes, then check the dipstick (yellow handle near the filler). Add more oil as needed to reach the full mark (total 6 quarts). Replace the filler cap.
- Start and Check: Start the engine and let it idle for 2-3 minutes. Check for leaks under the vehicle. Turn off, wait 5 minutes, and recheck the oil level on the dipstick. Adjust if necessary.
- Reset the Oil Life Indicator: Turn the ignition to ON (don’t start), fully depress the accelerator pedal three times slowly within 10 seconds, then turn off. This resets the system on most JL models.
If you encounter issues like a stuck filter or leaks, consult a professional. Change oil every 5,000-7,500 miles or as per your manual.
