Now I used Redline in my Sear's Craftman rideing garden tractor wich is carberated and it did fine. In fact I often test stuff on this rideing lawnmower. I put an entire bottle of SI-1 in that little 1 gallon tank and it ran fine!!!I used it in my 4Runner for years my Camry for almost 4 years, wifes 1997 Lasaber for years as well. They all run noticely better buy the time they have ran 3/4 of the tank through them!