Fuel and Engines
Fuel and Fuel Intake
VW Passat

What damage is caused by putting diesel in a petrol car?


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Wiki User
2009-11-14 12:23:46
2009-11-14 12:23:46

Putting diesel in a gasoline powered engine is less damaging than putting gasoline in a diesel. Depending on the amount of diesel and how long it took to find out it was in there, either after running or just after filling up and not attempting to start and noticing. Obviously if vehicle wasn't started just drain tank and refill w/petrol. If vehicle was started and stopped running, Drain fuel tank and flush, disconnect fuel lines at engine and fuel tank, install a suitable container over end of fuel lines and blow air through lines until all traces of diesel are gone. Remove and replace spark plugs. Replace fuel filter, fill tank with petrol and start vehicle. After running first tank of fuel through vehicle drop and replace fuel filter one more time. Hope this info was helpful.

The best bet is to always drain the tank if the wrong fuel is put in.


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You will have to clean out the tank.

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