Yeah as above just fill up with diesel.

But I heard this about putting petrol in a diesel. Because of the hig compressio ratio already in diesels and because petrol is more combustible, it is dangerous because detonation or pinking may occur if ran totally on petrol. I was told this by a mechanic and I can see the logic in it so why have some people said that their engines have just conked out or ran OK? Just curious