Medium-speed marine oil 3030,4030 Great Wall brand medium-speed marine engine oil is selected high viscosity index base oil, adding a selection of a variety of high-quality additives. Great Wall of medium-speed marine oil series include the 3012,4012,3020,4020,3030,4030,3040,4040 grades, Great Wall, medium-speed marine oil for medium-speed trunk piston diesel engine lubrication. Great Wall 4030 medium speed engine oil for MAN B & W certification. 1 medium-speed marine diesel engine cylinder piston oil 4030 has a good base value retention and anti-rust properties, can effectively inhibit the acid corrosion due to sulfur fuel combustion, to prevent rust and corrosion of the parts, and engine 2 excellent resistance to oxidation and thermal stability to provide effective protection to reduce the rate of oxidation of the oil, and to extend the use of time medium-speed marine diesel engine cylinder piston oil 4030 has excellent dispersion of clean, effective in preventing high-temperature coke and low-temperature medium-speed marine sludge formation, keep the engine clean good water separation properties quickly will enter the oil water separators, avoid oil emulsion 5. marine medium speed engine oil 3030,4030 applicable to the use of sulfur content of 3.5% trunk piston diesel engine large vessels auxiliary engines, land use diesel generator lubrication meet the performance requirements of OEMs, are widely used in a number of large vessels medium-speed marine oil 3030 applicable to new engine lubrication to reduce energy consumption 8 medium speed engine oil storage and transportation process should pay attention to as far as possible be stored indoors, do waterproof medium-speed marine diesel engine cylinder piston oil as much as possible in the course of not mixing with other brands or other types of products to use