Was the oil burnt? Also, are you sure it was a metal build up and not carbon?
As far as the oil, rings or valves can allow oil into the combustion chamber, but it usually burns and you see blue smoke from the exhaust. Did you ever notice that?
Based on the mileage, 250K, you may want to do a compression test to identify if there is a leak or low compression in one of the cylenders.
Saturday, June 27th, 2009 AT 6:00 PM