Castrol Premium Cool Plus 50 is a READY-TO-USE 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 sleeve cylinder liners.

Castrol Premium Cool Plus 50 is a low silicate, phosphate and amine free formulation providing long service life and excellent corrosion protection for lead solder, aluminium, yellow metal and ferrous alloys. The inclusion of a number of corrosion inhibitors prevents corrosion occurring in the number of dissimilar metals found in modern engine cooling systems.

Castrol Premium Cool Plus 50 meets or exceeds major industry coolant standards and is suitable for use in the majority of U.S., European and Japanese origin heavy duty diesel engines.