I began using Microlon Products in 1985 with the installation of the new $40,000 Continental IO 520 Aircraft engine in my Beech Bonanza F33A. The engine is a bit over it’s engineered life span now and all compression and wear readings are like new. This is unheard of with just 25 hour oil changes. No corrosion, no internal rust, no nothing! Same with my 1959 Bentley S1, 1979 Rolls Royce Silver Shadow II and two 2009 VW CC’s with V6 VW engines. Microlon products do what they clam. Just ordered some for my 2012 VW Tourage SUV TDI Diesel and expect the same results.