Oil Change — Pentastar 3.6L and eTorque

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.

Steps

1. Run engine 2–3 minutes to thin the oil. Shut off.
2. eTorque only: Cycle key to RUN then OFF, then immediately disconnect 12V negative terminal. This prevents auto-start during the change.
3. Pull the engine cover (friction fit).
4. Loosen the filter cap one turn to let oil drain into the housing before pulling the drain plug.
5. Position drain pan under oil pan. Remove 13mm drain plug. Drain 5+ minutes.
6. Remove filter cap completely. Lift out old cartridge. Wipe housing.
7. Replace cap O-ring. Lubricate new O-ring with fresh oil. Snap new cartridge into cap. Reinstall, torque to 25 Nm (18 ft-lb).
8. Install drain plug with new crush washer. Torque to 20 ft-lb.
9. Add 5 qt (non-eTorque) or 5.5 qt (eTorque) of 0W-20 full synthetic through the cap.
10. Reconnect 12V if disconnected. Start engine; verify oil pressure light goes out within 3 seconds.
11. Wait 5 minutes, check dipstick. Top off as needed — do not overfill.

Why it works

• Top-mount filter, no crawling
• 30–60 minute job
• Common 0W-20 synthetic at any parts store
• Same procedure regardless of door count or transmission

Trade-offs

• Plastic filter cap requires care
• eTorque adds a battery-disconnect step
• Wrong viscosity (especially old 5W-30 inventory) will trigger fuel trim drift on long-term monitors
• Pentastar still loves to coke intake valves — frequent oil changes help but don't solve it

Tools required

• 13mm socket
• oil filter cap socket (76mm, 14-flute)
• drain pan (6+ quart)
• torque wrench
• shop rags

Parts

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

Sources

• 2018+ JL Wrangler owner's manual — 3.6L oil spec 0W-20
• JL 3.6L Pentastar oil capacity (5 qt non-eTorque, 5.5 qt eTorque)
• Pentastar cartridge filter housing torque 25 Nm

Related

• All Jeep Wrangler JL guides & tools
• Browse the full DIY database

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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.

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