Water remover & premium fuel-line antifreeze + injector cleaner. Helps increase gas mileage, engine performance & smooth idle. Capless gas tank compatible. Year round performance. Fast starts year round. Helps prevent fuel-line freeze-ups. Removes water from fuel system. Helps prevent rust and corrosion. Helps clean fuel injectors and carburetors. Safe for catalytic converters and oxygen sensors. Use in all engines, including 2-cycle diesel engines. Safe for use in gas, E10, E85 & diesel fuels. Satisfaction Guaranteed: If not satisfied, mail sales receipt to us & your purchase price will be refunded. This diesel fuel additive complies with the federal low sulfur content requirements for use in diesel motor vehicles and nonroad engines. www.iso-heet.com. Made in USA.