2018 Jeep Wrangler - Maintenance & Specs
The 2018 Jeep Wrangler belongs to a Jeep Wrangler lineup that Know Your Ride tracks across 32 model years, from 1986 to 2026. Engine options on record include the 3.6L V6, 3.6L. It is configured as 4-wheel drive with an automatic 5-spd. The 2018 sits mid-run, with both earlier (1986) and later (2026) Wrangler model years also documented.
It takes 5W-20 full synthetic oil, 5.0 qt with a new filter meeting MS-6395. Fluid specs on file include HOAT coolant, DOT 3 brake fluid, ATF+4 transmission fluid. Know Your Ride lists 14 scheduled maintenance items for this vehicle, the earliest interval falling at 7,500 miles. Documented torque values include oil drain plug 20 ft-lb, lug nut 100 ft-lb, spark plug 18 ft-lb.
NHTSA complaints for this vehicle cluster around steering (670), steering,suspension (173), electrical system (101). A representative report reads: "Defect in the instrument panel cluster (IPC) that can cause it to go blank or fail entirely. Screen is completely blank which makes it impossible to monitor or..." There are 14 safety recalls on record; one covers: Chrysler (FCA US LLC) is recalling certain 2018 Jeep Wrangler vehicles. The rear under body ladder rail may corrode, possibly reducing the strength....
EPA fuel economy is rated at 17 city / 21 highway MPG, 18 MPG combined. Estimated annual fuel cost is about $2,450.
Quick Specs
| Oil viscosity | 5W-20 |
| Oil type | Full Synthetic |
| Oil capacity (w/ filter) | 5.0 qt |
| OEM oil spec | MS-6395 |
| Oil filter | Mopar 68191349AC |
| EPA combined | 18 MPG |
| Tire size | 245/60R18 |
| Coolant | HOAT |
| Open recalls on record | 14 |
| Technical service bulletins | 200 |
Common Trouble Codes
- P0300 - Random/Multiple Cylinder Misfire Detected
- P0420 - Catalyst System Efficiency Below Threshold (Bank 1)
- P0171 - System too Lean (Bank 1)
- P0128 - Insufficient Coolant Temperature for Stable Operation
- P0442 - Evaporative Emission Control System Leak Detected (small leak)
- P0455 - Evaporative Emission Control System Leak Detected (gross leak)
- P0700 - Transmission Control System Malfunction
- P0301 - Cylinder 1 Misfire Detected
- U0100 - Lost Communication With ECM/PCM A
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Part of the free Know Your Ride vehicle maintenance reference. Figures are sourced from EPA, NHTSA and manufacturer data and are for general reference - always confirm with your owner's manual.