I want to thank you for producing your heavy duty oil stabilizer. My dealer wanted $650 to stop a leak in my vw passat. I can not fork out that kind of money when I am putting myself through school. I put this in my car halfway through a 300 mile trip. It stopped the leak, and my mileage went up also. Thank you sincerely for making something that works for those of us that are on a budget!

Andy