Designed for heavy duty diesel engines using more than 33% antifreeze or a supplemental anti-corrosion package. Similar properties and benefits to regular WaterWetter®, but lacks oxidation and corrosion inhibitors. Diesel highway cars and trucks (equipped with Cummins, Duramax and PowerStroke engines) should use regular WaterWetter® to ensure adequate rust and corrosion protection. A typical diesel commercial vehicle requires one bottle and treats up to 15 gallons Does not contain ethylene glycol.