Turbo Max 15W To 40 is an advanced heavy duty diesel engine oil. It can be used in high speed diesel engines that can run on a variety of fuel types. This is compatible with diesel engines fitted with exhaust gas recirculation (EGR) systems. CRB Turbomax with DuraShieldTM boosters helps to prevent the agglomeration of soot as well as protect surfaces from wear. Turbo Max 15W To 40 with DuraShieldTM boosters provides a protective layer on the moving metal surfaces which resists breakdown, even under difficult conditions.