I have heard for years the positive reviews of LIQUI MOLY oil and additives. I was skeptical and before I recommend any product to my customers I thoroughly test them. I took a Porsche Cayenne GTS, Mercedes C320 and a Porsche 993 and tested them on a dynamometer. I then flushed all three engines using LIQUI MOLY Engine Flush. Upon completion, I added Leichtlauf High Tech 5W-40 oil, Motor Oil Saver and Cera Tec wear protection. I then re-tested all three vehicles on the dynamometer. In my 43 years as an automotive professional working with European luxury and exotic cars in both Europe and Canada, I have not come across lubricants which enhance and restore engine and components on a level comparable to LIQUI MOLY products. The results were astonishing! The three vehicles experienced an increase of up to 20hp, increased torque, and generated 25 degrees less heat!