The RAM 1500’s oil specification depends on the engine and model year. In general, most gasoline Ram 1500s use a full-synthetic oil in 0W-20 or 5W-20, while EcoDiesel models require 5W-40. Always check the owner’s manual or the under-hood label for your exact configuration.
Engine-specific requirements
Gasoline engines
Gasoline Ram 1500s today primarily rely on synthetic engine oils in light viscosities. The exact specification varies by engine type and year.
- 3.6L Pentastar V6 (gasoline) — typically calls for 0W-20 full synthetic oil; capacity is about 6 quarts with a filter; ensure the oil meets API SP and ILSAC GF-6 (or equivalent) specifications. Some older or region-specific manuals may list 5W-20 as acceptable.
- 5.7L Hemi V8 — commonly uses 5W-20 (some earlier years used 5W-30); capacity is around 7 quarts with filter; use a full-synthetic oil meeting API SP and Mopar/ILSAC requirements.
Always verify the exact viscosity and capacity for your year and engine by consulting the manual or the label on the oil fill cap.
EcoDiesel engines
The EcoDiesel option has its own oil requirements separate from the gasoline variants.
- 3.0L EcoDiesel V6 — requires 5W-40 full synthetic oil; capacity is typically about 7 quarts with filter; oil should meet API CK-4 (or equivalent) and any OEM-specified standards for your model year.
As with gasoline models, confirm the precise spec for your vehicle’s year and VIN, since recommendations can shift with emissions standards and warranty considerations.
Why the differences matter
The chosen viscosity affects cold starting, lubrication film strength, fuel economy, and engine longevity. Using the wrong oil can impact performance and warranty coverage, so following the factory specification remains important, especially in extreme temperatures or heavy-duty use.
Summary
In short, RAM 1500 oil type is engine-specific: most gas-powered Rams use 0W-20 or 5W-20 full synthetic oil, while EcoDiesel models require 5W-40 full synthetic oil. Always verify the exact requirement for your engine and year in the owner’s manual or on the oil fill cap label, and use a reputable oil that meets the indicated specifications.