The 2018 Wrangler with the 3.6-liter Pentastar engine uses SAE 0W-20 synthetic motor oil.
For best results, use a full synthetic 0W-20 that meets API SN or newer and ILSAC GF-5 standards, preferably with a Mopar-approved filter, to ensure proper lubrication and warranty compliance.
Oil grade and specifications
Key requirements you should follow when selecting oil for the 3.6L Pentastar Wrangler:
- 0W-20 synthetic motor oil (full synthetic preferred)
- API SN or newer and ILSAC GF-5 compatibility
- Mopar-approved oil filter or an equivalent that meets OEM specifications
Using the recommended oil grade and a proper filter helps ensure reliable cold starts, smooth lubrication across operating temperatures, and adherence to warranty terms.
Capacity and maintenance intervals
Understanding how much oil your engine holds and how often to change it aids planning and maintenance:
- Oil capacity: typically about 5.5–6 quarts (with filter) for the 3.6L Pentastar Wrangler
- Oil-change interval: around 7,500 miles (12,000 km) under normal driving with synthetic oil; more frequent in severe conditions (extreme heat/cold, towing, dusty environments)
Always verify the exact capacity and interval in your owner’s manual or with a dealer, as configurations can vary slightly by model year or drivetrain.
Where to confirm official specifications
Owner’s manual and service literature
For an authoritative reference, consult the 2018 Wrangler owner’s manual, specifically the lubrication and maintenance sections. The windshield oil-change sticker also reflects the recommended interval and grade.
In all cases, choose a 0W-20 synthetic oil that meets API SN or newer and ILSAC GF-5, and use a Mopar-approved filter or equivalent. If you’re unsure about climate-specific needs or local requirements, consult a certified technician.
Summary
In summary, the 2018 Jeep Wrangler’s 3.6L Pentastar engine takes 0W-20 synthetic motor oil, with an approximate capacity of 5.5–6 quarts (with filter) and a typical change interval around 7,500 miles under normal conditions. Always verify exact specs in the owner’s manual for your specific vehicle configuration.