Emission standards for off-road diesel engines are set in the U.S. by the Environmental Protection Agency (EPA). The first off-highway diesel emissions standards began in 1996 with the implementation of Tier 1. Since then, increasingly aggressive standards have continued to be implemented to limit the amount of pollutants being released into the atmosphere. Tier 4A requirements for the high-horsepower (above 175 HP) engines went into effect in 2011.

Today’s antifreeze solutions are a sophisticated blend of chemicals specifically designed to provide not only freeze protection and enhanced cooling but protection from other dangers inherent in modern, complex cooling systems such as corrosion, cavitation erosion, etc.