⚠️ Ford manufacturer position
Ford PTS fuel module access varies by Mustang generation (rear seat or trunk access). Misfuel is misuse.
Vehicle information
| Make | Ford |
|---|---|
| Model | Mustang |
| Market status | Sold new in the US 1964–present |
| Body styles | Coupe, convertible |
| Generations | S197, S550 (2015–2023), S650 (2024–present) |
| Engine options | Gasoline: EcoBoost I4 and V8 gasoline; premium 91–93 AKI recommended on many trims; E10 standard |
| Fuel tank capacity | 16.1 gal (61 L) approximate — varies by generation |
| Fuel system | Gasoline direct injection on EcoBoost; port injection on some V8 configurations |
| Access method | Varies by generation — consult Ford PTS for S550/S650 |
| Anti-siphon | Yes |
| Service portal | Ford Motorcraft Service / PTS |
Misfuel risk Moderate
Performance coupe with gasoline-only US sales; diesel into tank is primary forecourt error.
If the engine was not started
Do not start; drain per PTS.
If the engine was started
HP fuel system inspection on EcoBoost if run on diesel-contaminated gas.
Access procedure
- Do not start the engine. Disconnect the negative battery cable per Ford service information.
- Relieve fuel system pressure using the OEM-specified procedure (often fuse removal for the fuel pump, then crank without starting).
- Access the fuel pump module via the OEM fuel pump access panel when equipped, or lower the tank per workshop manual if no panel exists.
- Disconnect fuel lines using quick-connect procedures in the service manual; contain vapors and bond/ground per OSHA 29 CFR 1910.106.
- Drain remaining fuel from the tank using approved recovery equipment; label containers for hazardous waste handling under EPA 40 CFR Part 262 where applicable.
- Inspect the tank, pump, and sender for contamination; replace the fuel filter per OEM guidance.
- Reinstall components, reconnect lines, and prime the fuel system before a supervised first start per OEM instructions.
Related models
Frequently asked questions
What if I put diesel in my Mustang?
Do not crank the engine. Drain and flush via Ford OEM fuel module access before start.
Should I siphon fuel from the filler neck on my Ford Mustang?
USIFDA certified repair facilities use Ford OEM-prescribed fuel module or tank access only. Filler-neck siphoning is not a certified misfuel recovery process in the United States.
Should I siphon fuel from the filler neck on my Ford Mustang?
USIFDA certified repair facilities use Ford OEM-prescribed fuel module or tank access only. Filler-neck siphoning is not a certified misfuel recovery process in the United States.
Need professional misfuel recovery?
Find a certified operator or read consumer guidance for your next steps.
Find an operator Consumer guidance