⚠️ Alfa Romeo overview
Alfa Romeo returned to the US market with Giulia and Stelvio gasoline models. High-pressure direct injection gasoline systems are sensitive to wrong fuel if a diesel nozzle is used. Stellantis warranty excludes fuel contamination; use TechAuthority procedures.
Service portal
Stellantis TechAuthority / Mopar
Fuel system notes
- US lineup is gasoline direct injection; no Alfa diesel sold new in the US.
- Giorgio platform models often allow pump access under the rear seat.
- Quadrifoglio models use high-output gasoline engines—confirm octane requirements after any drain.
Model index
Select a model for misfuel and fuel contamination procedures:
Frequently asked questions
Can I put diesel in my US Alfa Romeo?
US Alfa Romeo models are gasoline-only. Diesel in the tank requires full drain before starting; if started, high-pressure pump and injectors may need replacement per OEM.
Where is Alfa Romeo service information?
Stellantis TechAuthority (subscription) and authorized Alfa Romeo dealers use the same Mopar service ecosystem as other Stellantis brands.
Need professional misfuel recovery?
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