The RAM 1500 with a 5.7-liter HEMI typically uses a 5W-20 synthetic motor oil, with about 7 quarts total capacity including the filter. Some climates or model years may permit 5W-30; always verify the exact specification in your owner's manual or with a dealer.
Recommended oil type and specifications
Baseline guidelines follow what FCA/Chrysler recommends for the 5.7 HEMI across most RAM 1500 models. The following options reflect standard practice, but you should confirm for your exact year and configuration.
- Viscosity: 5W-20 synthetic motor oil (full synthetic preferred).
- Specifications: oil that meets Mopar MS-6395 and API SP; ILSAC GF-6 compatibility is common in newer formulations.
- Capacity: approximately 7 quarts with a filter (varies by year and whether an additional quart is used during the oil change).
- Alternate viscosity: 5W-30 is permitted in some climates or years per the owner's manual; use this only if specified.
In essence, most RAM 1500 5.7 HEMI engines are designed to run on a 5W-20 full synthetic oil, with roughly seven quarts of capacity, and the oil must meet FCA's MS-6395 specification and API SP compatibility. If in doubt, follow the manual.
Verifying the exact oil requirement for your year
Because oil recommendations can shift with model year, drivetrain, and climate, use these steps to confirm the precise specification for your truck.
- Consult the owner’s manual or the under-hood label for the recommended viscosity and spec.
- Check for any VIN-specific notes in the service section or warranty documentation—some configurations may have unique requirements.
- Choose a full synthetic oil that meets Mopar MS-6395 and API SP; ensure compatibility with ILSAC GF-6 (or GF-5) in your year’s oil lineup.
- If you are unsure, contact a RAM dealer or a certified mechanic with your VIN to confirm the exact spec and capacity.
Adhering to the correct viscosity, spec, and volume helps ensure optimal protection for the 5.7 HEMI and maintains warranty considerations where applicable.
Summary
For most RAM 1500 5.7 HEMI vehicles, use 5W-20 synthetic oil that meets Mopar MS-6395 and API SP, with about 7 quarts of capacity. Some climates or model years may allow 5W-30 — always verify your year’s exact specification in the owner’s manual or with a dealer to ensure proper protection and performance.