The JL Pentastar moved from 5W-20 (JK) to 0W-20 full synthetic. Use a cartridge filter — there's no spin-on. Drain plug torques to 20 ft-lb, filter cap to 18 ft-lb. eTorque models hold half a quart more oil than non-eTorque.
The 3.6L Pentastar in the JL is the same basic engine that was in the late JK, but FCA changed the oil spec from 5W-20 to 0W-20 for fuel economy. Either viscosity will run the engine; the 0W-20 reduces cold-start friction and helps the start-stop and eTorque systems behave smoothly. Use what the manual calls for and the OBD-II long-term fuel trims will stay where they should.
**Capacity.** 5.0 quarts on non-eTorque (2018+) and 5.5 quarts on eTorque mild-hybrid models with filter change. Always verify with the dipstick — overfilling causes the same intake-valve-coking issue the Pentastar is already prone to from direct injection.
**Filter.** Cartridge type, same plastic housing on top of the engine as the JK. Mopar 68191349AC is the OEM part. The plastic cap cracks under abuse — a 76mm 14-flute cap socket is the only correct tool. If a previous shop used channel locks and the cap is gouged, replace it before it splits in service (Mopar 68191344AB, ~$30).
**eTorque caveat.** eTorque adds a 48V belt-driven starter/generator (BSG) on the front of the engine. It doesn't change the oil change procedure, but it does mean the engine may auto-start during the change if you don't disconnect the 48V battery or follow the service mode procedure (turn ignition to RUN, then to OFF, then immediately disconnect 12V negative). Don't skip this on eTorque trucks.
| Part | Vendor | Est. price |
|---|---|---|
| 0W-20 full synthetic oil (5–6 quarts depending on year) | Mopar / API SP rated equivalent | ~$38 |
| Mopar oil filter (cartridge) | Mopar | ~$9 |
| Drain plug crush washer | Mopar | ~$1 |
Written and maintained by an AZ wheeler and driveway wrencher. Always cross-reference your factory service manual — modifications affect vehicle safety and warranty. Work at your own risk.