⚠️ Ram overview
Ram is Stellantis's US truck and commercial van brand, including gasoline and diesel pickups and ProMaster vans. Cummins 6.7L and 3.0L EcoDiesel common-rail systems are highly sensitive to gasoline contamination. Follow TechAuthority; DEF is separate from diesel fuel.
Service portal
Stellantis TechAuthority / Mopar
Fuel system notes
- Ram 2500/3500 Cummins diesel is a primary US gasoline-in-diesel exposure.
- Ram 1500 offered 3.0L EcoDiesel V6 through 2023 on select trims.
- ProMaster gasoline and diesel variants—confirm fuel door before drain.
Model index
Select a model for misfuel and fuel contamination procedures:
Frequently asked questions
What is the difference between EcoDiesel and Cummins?
EcoDiesel is a 3.0L V6 in Ram 1500 and some Jeeps; Cummins is the 6.7L inline-six in Ram 2500/3500 HD. Both use common rail and are sensitive to gasoline.
Where is Ram HD fuel guidance?
See Ram 2500/3500 HD page for Cummins-specific procedures; Ram 1500 has separate tank packaging.
Need professional misfuel recovery?
Find a certified operator or read consumer guidance for your next steps.
Find an operator Consumer guidance