Quote:
Originally Posted by slinky
With a diesel, if you put petrol in, it's not as disastrous. BUT you would have known about it if he has put diesel in a petrol
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Its the other way round.
A lot of petrol in a diesel engine can burn the valves due to the heat that is produced - you can get away with a bit but it is not advised. Diesel pumps create very high pressure's ( 15,000 psi and higher ) in a modern common rail engine which is produced by very expensive fuel pumps, petrol in the fuel will not be good for the pump.
Diesel in a petrol engine will make it smoke a lot, worst case it won't run at all. After the fuel system is flushed out with petrol all should be ok without any damage except maybe sooty plugs.