| 摘要 |
The present invention provides a kind of fuel-efficient engine oil with good high-temperature deposition performance, low wear characteristic and long service life. The lubricating oil composition for internal combustion engines of the invention is characterized in that the lubricating oil composition is produced by adding certain amount of alkaline earth detergent containing 0.12 to 0.24 percent metal ingredient by weight ratio, adding certain amount of P-type additive at least including zinc dialkyl dithio (ZnDTP) containing 0.005 to 0.070 percent P by weight ratio and adding certain amount of molybdenum dithiocarbamate (MoDTC) containing 0.030 to 0.075 percent Mo by weight ratio to mineral oil and/or synthesized base oil. The P content in the P-type additive and the Mo content in MoDTC satisfy the following formula (1): 0.5*P + Mo¿Q0.075 (1 ); [wherein, P represents the P content in the P-type additive of the lubricating composition (wt%); Mo represents the Mo content in MoDTC of the lubricating composition (wt%)]. |
