HUH? Any dirt in the block would be trapped by the oil filter before the first oil change. This happened at 140,000 miI'm talking about the manufacturing debris left in the oil galleries that loosens up and wipes bearing out. A ton of engines were destroyed by this. Both people i know with these engines had blown up around 100k. One was on a trip 1000 miles from home. At least they were eventually fixed under warranty. Took about two months for the factory replacement to come in though.