Roger: When you refer to "..engine wear, crud buildup...), " is it possible you're referring to valves, valve seats and/or seals, rings or other mechanical wear items? I ask as my car has relatively high mileage (143,000 miles). I am planning an engine transplant next summer so maybe I should just get a set of earplugs for now!

Thanks again.

Redcoat Raceworks. Performance parts and custom fabricating for Contours, Mystiques and Cougars. Specializing in chassis and suspension parts. Custom end links, control arms, strut tower bars, engine torque braces, etc.