| abstract |
Provided are a lubricant composition having low SAPS and fuel efficiency for a 4-stroke engine, and a package additive thereof. The lubricant composition of the present invention comprises: a) a base oil of group 1 to 5 of API classification; and b) a heavy polyα-olefin compound having a kinematic viscosity at 100 ° C. of 75 to 3000 cSt, and And / or a polyisobutene compound, and c) an ester represented by the formula: R (OH) m (COOR ′ (OH) p ) n or a boric acid derivative thereof (wherein, m is 0 to 8; n is 1 to 8) P is 0 to 8; p + m is at least greater than 0; and R and R ′ are each independently a saturated or unsaturated linear or branched hydrocarbon group having 1 to 30 carbon atoms; And optionally substituted with at least one aromatic group), having a sulfated ash content of 0.5% or less, a phosphorus content of 500 ppm or less, and a sulfur content of 0.00. Less than 2%. [Selection figure] None |