Maxtop CK-4 diesel engine oil is made of highly refined second class, third class, fourth class and fifth class base oil, and is refined by adding high-efficiency and multi-functional compound additives. Strengthen anti-wear protection: zinc, molybdenum and other anti-wear additives are used to reduce the wear of cylinder liner, piston ring and turbocharger, and extend the engine overhaul mileage. Fuel economy optimization: The low friction formula reduces mechanical resistance and reduces overall fuel consumption by 2%-4%, helping the fleet reduce operating costs. CK-4 diesel engine oil of various viscosity levels can be produced according to customer requirements.