Made using highly refined petroleum oils designed specifically for snowmobile engines.It utilizes a unique blend of specific additives and polymer systems that resist high shock loads, high temperatures, shearing and eliminates deposits.S-4m formula also includes our proprietary mpz® additive that provides the highest degree of anti-wear and anti-friction for superior component life and engine performance.Recommended for use in air cooled or liquid cooled snowmobile 4-cycle engines commonly found in arctic cat®, polaris®, ski-doo®, yamaha® and other snowmobile applications.