As we’ve been seeing more reports of oil overfill occurring on the Jeep JL, we’d like to remind everyone that the oil capacity is 5 quarts for both the 3.6L Pentastar V6 and 2.0L turbo 4 cylinder engines in the Jeep JL Wrangler.
Mistakes are being made and engines overfilled with oil — particularly on the 3.6L Pentastar V6, because the version of the Pentastar V6 in the JL Wrangler is the latest PUG (Pentastar Up-Grade) version, and one of the changes seen on this version is a decrease in oil capacity. The 2018+ JL Wrangler requires 5 quarts of engine oil, not 6.5L like 2012-2018 JK models.
Hence, many JL owners are reporting that dealers are overfilling their engines when performing oil changes. So, please remember to remind your dealer/shop when having your oil changed, and check your dipstick after oil changes to be doubly sure the engine wasn’t overfilled. Or, you can avoid taking a chance and change the oil yourself. Here’s DIY instructions on changing the Jeep JL engine oil.
Excessive oil overfill can result in engine damage. Since there is nowhere for the excess oil to go, the crankshaft turns and oxygenates the oil, turning it into a foamy mixture. Foamed oil doesn’t lubricate effectively and can cause overheating and damage engine parts. Overflowing engine oil can also damage seals and gaskets as the excess oil is forced out of the engine.