摘要:
An internal combustion engine crankcase lubricating oil composition is disclosed. The crankcase lubricating oil composition has a TBN no greater than 6 and contains the following additives: (B1) a metal detergent system having a metal ratio no greater than 3, as the sole detergent system; (B2) an organic ashless friction modifier; (B3) an oil-soluble molybdenum friction modifier; and (B4) a metal dihydrocarbyl dithiophosphate.