Prestone Command Heavy-Duty Antifreeze/Coolant is available in two different formulations: Extended Life provides 600,000-mile/12,000-hour CAT EC-1 protection for any diesel-powered heavy-duty engine; and Extended Service is SCA pre-charged and provides advanced protection from freezing, overheating, cavitation erosion, corrosion, scale and foaming in any heavy-duty engine with need-release filter technology that is used in normal to severe duty cycles and extreme temperature conditions.
