Safely extend the life of stored gasoline, diesel fuel and aviation fuel for up to one year by using fuel stabilizers from Grainger. A fuel stabilizer inhibits the formation of varnishes, peroxides and gums that can clog fuel tanks, lines, and carburetors, making it harder to start the engine after a prolonged period. To preserve the fuel in lawnmowers, tractors and other small engines, choose fuel stabilizers rom Grainger.