I Have a tick in the head of my new van which I believe is a stuck lifter. It wasn't there on the 10 hour drive back to its new home and either was the steady oil leak, both problems occurred after sitting for a few weeks in the barn out back. I talked with a man whom told me to drain out a quart of oil and add 1 quart of Diesel fuel. Start engine and let warm to operating temperature, shut off let cool all the way down and repeat process a couple of times. drain and replace oil. He said there's a detergent in diesel that cleans residues from the engine. Is this risky with seals or any internal components? I'd like not to try until confirming some feed back from you all-.