ASHLESS TYPE ENGINE OIL COMPOSITIONS FOR FUEL EFFICIENCY

摘要

The present invention relates to an ashless type engine oil composition for improving fuel efficiency. More particularly, the invention relates to an ashless type engine oil composition includes glyceryl monooleate, molybdenum dithiocarbamate and a dihydrocarbyl dithiophosphate metal salt together as a friction modifier, thereby providing advantages of protecting a filter which is equipped in an exhaust gas post-processing device, protecting an environment from an exhaust gas, and improving gas mileage by maintaining sulfated ash in an amount of 0.8 wt% or less based on total weight of the engine oil composition.