ALL FLEET HDD COOLANT is a high quality long life heavy duty diesel engine coolant based on hybrid technology which offers conventional technology coupled with Organic Acid Technology (OAT). It is a three in one, offering anti freeze (-37c), anti rust and anti boil. It is a high quality long life coolant suitable for use in most cooling systems including those containing aluminium. It has a service life of six years, 12,000 hours or 1,000,000km – whichever comes first. ALL FLEET HDD meets the requirements for Caterpillar, Cummins, Mack, Detroit Diesel, DaimlerChrysler, Ford, MAN, Mercedes Benz, MTU, New Holland, Peterbuilt, Landrover, Kenworth, Scania, Perkins, Freightliner and Volvo. Coloured Green. It is available in both concentrate and pre-mixed.