The best oil for most 5.7 L HEMI engines is a full-synthetic motor oil that meets Chrysler’s MS-6395 specification, typically in 5W-20 viscosity. In very hot climates or when heavily towing, 5W-30 is an acceptable alternative. Always follow your vehicle’s owner manual for the exact grade and spec required.
Understanding the 5.7 L HEMI oil needs
The 5.7 L HEMI uses a specification known as MS-6395, which applies to many gasoline engines in Chrysler, Dodge and Ram vehicles. Oils that meet this spec, and that carry API SP or newer certification, will provide the protection and performance the engine requires. The recommended viscosity can vary by year, market and climate, so the manual is the definitive source. In practice, most modern 5.7 HEMIs use a synthetic oil that adheres to MS-6395, with 5W-20 as the default starting point for typical conditions.
Recommended viscosities for most 5.7 L HEMIs
Below is a practical guide to the viscosities you’ll commonly see recommended for the 5.7 HEMI. The exact grade for your model year should be confirmed in the owner’s manual or via your dealer.
- 5W-20 synthetic oil that meets MS-6395 and API SP or newer — the default choice for most climates and driving styles
- 5W-30 synthetic oil that meets MS-6395 and API SP or newer — preferred in hot climates, high-load towing, or if your manual allows it
- 0W-20 or 0W-30 — used only if explicitly specified by the owner’s manual or regional guidelines for certain markets
In practice, 5W-20 synthetic is the common default for recent 5.7 HEMI engines, with 5W-30 serving as a solid alternative where higher ambient temperatures or heavier duty usage warrant it. Always consult the manual for your exact configuration.
Choosing a brand and specification
Look for oils that explicitly meet Chrysler MS-6395 and carry API SP (or a newer API specification). This ensures compatibility with the engine’s tolerances and lubrication system. Many reputable brands offer products that satisfy these requirements.
- Pennzoil Platinum Full Synthetic 5W-20 (MS-6395 compliant)
- Mobil 1 Full Synthetic 5W-20 (MS-6395 compliant)
- Castrol EDGE Full Synthetic 5W-20 (MS-6395 compliant)
- Valvoline Advanced Full Synthetic 5W-20 (MS-6395 compliant)
- Shell Rotella Full Synthetic 5W-20 (MS-6395 compliant, where coverage applies)
Choosing a brand that clearly states MS-6395 compatibility helps ensure you’re using a specification-approved product. If in doubt, ask a dealer or check the product label or manufacturer website for the MS-6395 confirmation.
Oil change intervals for a 5.7 L HEMI
Oil change intervals depend on driving conditions and whether you use synthetic oil. Most owners can expect longer intervals with synthetic oil, but severe service or frequent towing reduces that window. Rely on the vehicle’s oil life monitor and the manual for precise guidance.
- Normal, non-severe service with synthetic oil: about 7,500 miles (12,000 km) or up to 12 months, whichever comes first (per the monitor and manual).
- Severe service or extreme conditions (towing, dusty or hot climates): typically 3,000–5,000 miles (5,000–8,000 km) or as indicated by the monitor.
- Always consider the oil change reminder system and local temperature/climate guidance; some markets may have different recommended intervals.
In all cases, using a high-quality synthetic oil that meets MS-6395 and staying within the manufacturer’s interval guidance helps protect the engine’s bearings, pistons and tolerances over time.
Summary
For most 5.7 L HEMI engines, the best oil is a full-synthetic 5W-20 that meets Chrysler MS-6395 and API SP or newer. 5W-30 is a strong alternative for hot climates or heavy towing when allowed by the manual. Always verify the exact grade and spec in your owner’s manual, and choose a brand that clearly states MS-6395 compatibility. Follow the recommended oil-change interval based on driving conditions and use the vehicle’s oil life monitor as your primary guide.
If you’d like, I can tailor these recommendations to your model year, climate, and driving habits by checking your specific vehicle’s manual or offering brand-specific product links.