The invention provides a high-pressure-charging long-service-life
diesel engine oil which comprises the following components in percentage by weight: 80-90% of
base oil and 10-20% of additive. The
base oil comprises 72-80% of paraffin base Type II or Type III, 3-6% of high-
viscosity poly-alpha-olefin of which the
viscosity is 100-300 mm<2> / s at 100 DEG C and 1-3% of ester oil. The additive comprises 1-3% of hyperalkaline
calcium sulfonate, 7-10% of polyisobutylene polysuccimide, 1-3% of sulfurized
calcium alkyl phenate, 1-3% of
sulfur /
phosphorus bis octyl alkaline octyl salt, 0.001-0.005% of oil-soluble
graphene, 0.3-1% of amine high-temperature
antioxidant, 0.1-0.3% of pour-point
depressant and 0.001-0.002% of composite defoaming agent. The
diesel engine oil has the advantages of excellent high temperature detergency, excellent
acid neutralizing capacity and
rust resistance, is capable of effectively reducing high-temperature deposits on engine components and prolonging the oil change period, can inhibit the carbon deposits and paint film on the engine
piston from generation, can form a complex
micelle with a metallic detergent, has the characteristics of excellent consonance effect, excellent
heat stability and outstanding abrasion resistance.