A kind of ultralow temperature diesel engine oil

The invention belongs to lubricating oil research and development technology field, more particularly to a kind of ultralow temperature diesel engine oil.A kind of ultralow temperature diesel engine oil, it is characterised in that be made up of following components by weight：6.0 6.5 parts of 20 22 parts of 4 base oils of PAO, 51 55 parts of 6 base oils of PAO, 5 parts of esters base oil, 15.1 parts of compound additive, 0.45 part of auxiliary agent and tackifier.Ultralow temperature diesel engine oil of the invention is combined using the base oil and additive of high-quality, and oil pour point is low, reaches 66 DEG C, can meet the use in China's all region winters；Ultralow temperature diesel engine oil of the invention can meet the viscosity grade requirements of 0W 30；Ultralow temperature diesel engine oil of the invention can meet the requirement of the credit ratings of API CI 4.