I've just done this crazy thing. Filled my diesel Mondeo with petrol!!! I noticed part of the way through, so the tank has about 30 litres of petrol and 20 litres diesel. I drove it back and it didn't seem to notice the wrong fuel, but I turned the engine off and coasted as much as possible to avoid pump wear.
Any ideas as to the best course of action, other than cutting my throat?
I've seem some advice along the lines of put engine oil in the tank to add lubricant until the next fill, but how do you mix engine oil with diesel/petrol that's already in the tank?
Rob Graham