us Transport & mobility emergencies wrong fuel in car • misfueled at gas station • gasoline in diesel truck • diesel in gasoline car • wrong fuel not started • engine not started yet • wrong fuel in tank • accidental misfueling • filled wrong pump • wrong nozzle used • put wrong fuel in vehicle • gas station fuel mix up • misfueling mistake • wrong fuel in rental car • wrong fuel in work vehicle • push car in neutral • keyless start wrong fuel • don’t start engine wrong fuel

What to do if…
you accidentally put the wrong fuel in your vehicle and have not started the engine

Short answer

Do not start the vehicle or turn the key to ON/ACCESSORY—then arrange roadside assistance/towing so a shop can drain the fuel system before it’s driven.

Do not do these things

Don’t start the engine, and don’t turn the ignition to ON/ACCESSORY “for a second”.
Don’t try to “dilute” it by topping up with the correct fuel and driving off.
Don’t attempt a DIY siphon/drain at the gas station (spill/fire risk and may violate station rules).
Don’t let a friend tow it in a way that could be unsuitable for your drivetrain (if unsure, request a flatbed tow).
Don’t keep fiddling with buttons on a keyless car—avoid anything that could prime the fuel system.

What to do now

Lock in the “no start” decision. Put the key/fob away from the driver’s seat. Don’t press the start button and don’t switch on accessories.
Notify the station attendant. Tell them you put in the wrong fuel and the vehicle has not been started. Ask where they want it moved so it’s out of the way.
If you must reposition the vehicle, move it without starting it. Put it in neutral and, with help, push it to a safer spot (only if it’s safe to do so).
Call roadside assistance (AAA or your insurer’s roadside number) or a tow company. Ask for towing to a shop or mobile service for a fuel tank drain/clean. Clearly state: wrong fuel added, approximate amount, and engine not started.
Contact the right “owner” if it’s not your personal car.
- Rental: call the rental company roadside number before authorizing tow/repairs if required by the contract.
- Company/fleet: call your fleet manager/vendor so the tow and repair follow policy.
Document the basics for follow-up. Keep the receipt, note the pump number, station address, and time.

What can wait

You don’t need to decide right now whether to file an insurance claim—first prevent the engine from being started and get proper service arranged.
You don’t need to troubleshoot or scan codes—if the engine hasn’t run, focus on safe towing and professional draining.
You don’t need to negotiate with the station unless there’s clear evidence of mislabeling/contamination; just document details for now.

Important reassurance

Catching this before starting the engine is the best moment to catch it. The goal now is simple: keep it off, and let roadside/repair professionals handle the drain/clean.

Scope note

These are first steps only. The exact drain/clean approach varies by vehicle and fuel system; the shop/technician will handle the specifics.

Important note

This is general information, not mechanical or legal advice. Follow your owner’s manual and the instructions from your roadside provider/tow operator and repair shop, especially about towing method and where the vehicle can be worked on safely.

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What to do if…you accidentally put the wrong fuel in your vehicle and have not started the engine