Castrol Premium Cool Plus. Recommended for heavy duty diesel engines in on & off highway applications.

This Engine Coolant Concentrate is an ethylene glycol based engine coolant containing a balanced mixture of organic acid and inorganic corrosion inhibitors specially designed to service the requirements of a broad range of heavy duty diesel engines, particularly those with wet liners. The inclusion of a number of corrosion inhibitors prevents corrosion occurring in the number of dissimilar metals found in modern engine cooling systems. It is particularly recommended for wet liner engines, operating in both on-highway and off-road environments and arduous city stop-start driving conditions. Suitable for a wide range of heavy dutydiesel engines.