26-04-14, 11:24 AM
As said, a bit of diesel in a petrol engine will just make it smoke a bit but won't do any harm. A bit of petrol in a diesel engine won't do any harm if it is an old tech diesel engine but if it is one of these modern high pressure common rail things then it's different. If the engine isn't started and all the fuel is drained out, it isn't a problem. If the engine is started and run then there may be no problems now but it will almost certainly lead to problems in the future. Daughters boyfriend had a TDCi Mondeo that decided it was going to not like starting. Took it into a local garage to be checked over and they recognised it. A month before he had bought it, it had been in as the previous owner had put petrol in it. It was going to need new injectors at £130 each and a new fuel pump at £800 to repair the damage.