The 5.7 HEMI typically uses 5W-20 as the standard oil grade, with 5W-30 permitted as an alternative under certain conditions. This article explains the official guidance, when to use each grade, and how to confirm the right specification for your vehicle.
What the official guidance says
Automakers update guidance by model year. For the 5.7 HEMI family common in Dodge Ram and Challenger/Charger platforms, the owner's manual generally lists 5W-20 as the primary viscosity. In some regions or situations, 5W-30 is listed as an acceptable alternative. Always consult your exact model year's manual, since conditions such as ambient temperature, towing, and engine wear can affect the recommended grade.
- 5W-20 is the typical recommended viscosity for normal operation and good fuel economy.
- 5W-30 is an acceptable alternative under certain conditions, such as hot climates, heavy towing, or severe service, if permitted by your manual.
In short, the primary recommendation is 5W-20; 5W-30 may be used as an exception when permitted by the manual for your vehicle.
How to confirm the right grade for your vehicle
To avoid using the wrong oil, follow these steps:
- Check the owner's manual lubrication section for the exact viscosity specification.
- Look for a label under the hood or near the engine that shows the recommended oil grade and capacity.
- Consult your dealership or a trusted service center if your manual is not accessible or unclear.
- Consider your climate and usage (towing, hot summers, long highway runs) when deciding whether to switch to a different viscosity.
By verifying the approved viscosity for your year, you protect the engine's performance and warranty coverage.
Additional context
In practice, the 5.7 HEMI's design supports 5W-20 in most markets, with 5W-30 appearing in the owner's manual as an allowed alternative in specific conditions. Always follow the official guidance for your vehicle's year and region.
Summary
For most 5.7 HEMI engines, 5W-20 is the recommended oil grade. 5W-30 can be used as an alternative under certain conditions, but you should verify with your owner's manual or dealer for your exact model year and climate. Keeping the right viscosity helps with temperature protection, fuel economy, and engine longevity.