The 2015 Wrangler with the 3.6L Pentastar uses SAE 5W-20 motor oil that meets Chrysler’s MS-6395 specification, and the engine holds about 6 quarts of oil with a filter change. Synthetic or synthetic-blend oils are fine as long as they meet the required standards.
Oil type and specifications
For the 3.6L Pentastar in the 2015 Wrangler, the recommended viscosity is 5W-20. Oils used should meet API SN (or newer) and Chrysler MS-6395 specifications to ensure proper protection and warranty coverage. Both conventional and synthetic oils that meet these specs are acceptable, though many owners opt for synthetic for potential longevity and protection.
Viscosity, standards, and what they mean
Viscosity grades describe how the oil behaves at different temperatures. 5W-20 is designed to flow well in cold starts while maintaining adequate lubrication at operating temperatures. MS-6395 is Chrysler’s specification for engine oils used in many of its engines, ensuring compatibility with seals, tolerances, and long-term reliability. API SN or newer indicates the oil meets modern performance and emission-related requirements.
Oil capacity and maintenance intervals
The oil capacity with filter change for the 3.6L engine is approximately 6 quarts. Oil-change intervals depend on oil type and driving conditions. With synthetic oil, owners commonly follow about 7,500 miles (or up to 12 months, whichever comes first); with conventional oil, a more frequent interval (roughly 3,000–5,000 miles) is typical. Always consult the vehicle’s owner’s manual or your dealership for the exact interval for your climate and usage.
Before you proceed, here are the approved options to consider for this engine.
Approved oil options:
- 5W-20 full synthetic motor oil that meets API SN or newer and Chrysler MS-6395
- 5W-20 synthetic blend that meets API SN or newer and Chrysler MS-6395
- 5W-20 conventional motor oil that meets API SN or newer and Chrysler MS-6395
Whichever option you choose, ensure the oil label explicitly states 5W-20 and MS-6395 together with API SN or newer. Using an oil that does not meet these specs can affect protection and warranty.
Practical steps for oil changes and shopping tips
If you’re performing a DIY change or choosing a shop, follow these practical steps to ensure you get the right oil and service.
- Verify the oil specification: 5W-20 viscosity and MS-6395 with API SN or newer.
- Choose the oil type: full synthetic, synthetic blend, or conventional as long as it meets the spec.
- Ensure you have about 6 quarts of oil and a compatible oil filter.
- Warm up the engine, drain old oil, replace the filter, and refill to the proper level.
- Check oil level with the dipstick, then run the engine to operating temperature and recheck.
- Dispose of used oil and filter properly and reset any service indicators if needed.
These steps help ensure the Wrangler’s engine remains properly lubricated and within warranty requirements.
Summary
In short, the 2015 Jeep Wrangler 3.6 takes SAE 5W-20 motor oil that meets Chrysler MS-6395 and API SN or newer. The engine holds about 6 quarts with a filter; you can use synthetic, synthetic-blend, or conventional oil as long as it conforms to the specified standards. Always follow the owner’s manual for the exact oil-change interval and consult your dealer if you’re unsure about climate-specific recommendations.