Selective catalytic reduction (SCR) is a means of converting nitrogen oxides, also referred to as NOx with the aid of a catalyst into diatomic nitrogen, N2, and water, H2O. Oils NOx Neutraliser has been specially formulated for use in all Heavy Duty Diesel Engines employing the latest SCR NOx Reduction Systems. Oils NOx Neutraliser is manufactured using Laboratory Grade anhydrous ammonia and special additives to prevent freezing at low temperatures. Reduces harmful oxides of nitrogen by 75% – 95% ensuring current emission standards are met.