I own a 2001 MB CLK320 convertible. I purchased the vehicle with 101,000 miles. The engine is consuming lots of oil 1qt/500 miles. There are no visible leaks and I have replaced the valve cover gaskets, had the oil changed, and am using Castrol GTX 20W50 in the crankcase. What is the problem? My guess is the valve seals, although I never see any smoke from the tail pipe. What are your thoughts?
Saturday, October 20th, 2012 AT 1:51 PM