Mak diamond 15w, 40 is a heavy duty oil formulated for diesel engines composed of premium refined enhanced viscosity index group ii plus base stocks. It has been designed to perform under the most stringent operating condition Designed for tough applications diesel engines. It offers outstanding protection against oil thickening, Oil degradation and corrosion. This oil has good shear stability and maintains its viscosity even under high shear, High temperature conditions. Mak diamond 15w, 40 provides the pinnacle of quality of protection for relatively older large or, Diesel engines small, Non, Turbocharged or turbocharged diesel engines requiring added wear protection and prevention of oil loss of a higher viscosity engine oil. Applications mak diamond 15w, 40 is recommended designed for application in diesel engines meeting bs i and bs ii standards of emission for vehicles such as heavy duty trucks, Buses, Lcvs, Suvs and diesel passenger cars. It is designed for diesel engines requiring oils such as cf, 4, Cf and cd performance. Alternatively be guided by oem s recommendation