⚠️ Ford Mustang — Moderate misfuel risk
Performance coupe with petrol-only NZ 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 petrol.
⚠️ Ford position — Mustang
Ford PTS fuel module access varies by Mustang generation (rear seat or boot access). Misfuel is misuse.
Vehicle information
| Specification | Details |
|---|---|
| Make | Ford |
| Model | Mustang |
| Market status | Sold new in New Zealand 1964–present |
| Body styles | Coupe, convertible |
| Generations | S197, S550 (2015–2023), S650 (2024–present) |
| Engines | Petrol: EcoBoost I4 and V8 petrol; premium 91–93 AKI recommended on many trims; E10 where label allows |
| Fuel tank capacity | Approximately 61 litres — varies by model year; consult OEM service information |
| Fuel system | Petrol direct injection on EcoBoost; port injection on some V8 configurations |
| Access method | Varies by generation — consult Ford PTS for S550/S650 |
| Anti-siphon | Yes |
| OEM service portal | Ford Motorcraft Service / PTS |
OEM 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 vapours and bond/ground per HSWA 2015 and Health and Safety at Work (Hazardous Substances) Regulations 2017.
- Drain remaining fuel from the tank using approved recovery equipment; label containers for hazardous waste handling under HSNO Act 1996 and EPA NZ requirements for hazardous substances
- 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?
NZIFDA certified repair facilities use Ford OEM-prescribed fuel module or tank access only. Filler-neck siphoning is not a certified misfuel recovery process in New Zealand.
Should I siphon fuel from the filler neck on my Ford Mustang?
NZIFDA certified repair facilities use Ford OEM-prescribed fuel module or tank access only. Filler-neck siphoning is not a certified misfuel recovery process in New Zealand.
Need certified fuel contamination service?
Find an NZIFDA certified operator or read consumer guidance on wrong-fuel incidents.
Find an operatorFor consumers