a friend of mine said to me a few days ago that in his old 1989 Ford Escort, he used to flush the engine after each oil change with Diesel fuel! , he told me he'd drain the oil and put in a few liters of diesel fuel , and he would start the car and run it for no more than a minute, the drain the diesel out and put fresh oil back in, has anybody ever heard of a method like this?? i thought it was pretty odd, i know the guy pretty well and he has experience with cars.