FPC is a catalytic fuel agent that makes fuel burn more efficiently, even in a brand new engine. Increasing performance in a brand new engine is something other fuel additives just can’t do. Click here to see our fuel additive testing done on new engines. The benefits from using FPC have been proven by more than 2,556 fuel additive tests dating back to World War II. Large fuel users all across the world have used FPC for over 40+ years because it has proven itself to be the world’s best and most tested fuel booster. We guarantee that the fuel economy improvement from using FPC will more than pay for the purchase price of FPC, even if you have a used engine.