Now 8 mos since all the repairs. The X5 is still totally clean. I do not miss the old oil mess underneath. I did use about 3/4 quart of oil in 5,000 miles but I am OK with that. When I get bored I will pull off the valve cover vent hose and look for oil in the tubes. It should be dry but you never know. Now at 106,000 miles.