My local NAPA Auto Parts store (Waupaca Wisconsin) recommened the Lucas Fuel Treatment. I asked them what I should do to increase my gas mileage in my 1997 Audi A6 (142,000 miles). My wife drives an hour each way to work. I added it (6 oz) with a full tank and by half a tank we could feel the power! What a difference! She was able to get 60 more miles out of a tank of gas! I also use it now in my 1995 Toyota 4Runner (173,000 miles) and my 1967 Austin-Healey 3000 MkIII (92,000 original miles)! What a difference in power in all three of my vehicles!!! The Healey is like a new car! My Toyota was very doggy and now has power! I do not know what you make this out of, but it truly works!!!