UHPD 15w/40 E9 is a heavy duty diesel engine oil formulated to meet the severe lubrication requirements demanded by Mercedes Benz, Cummins and Volvo. It has been formulated to meet the demands of Euro 4 and Euro 5. UHPD 15w/40 E9 is a blend of solvent refined base oils, viscosity index improvers, pour point depressants, and an innovative additive system.