https://patents.google.com/patent/KR20150094521A/en
Ashless Type Engine Oil Compositions for Fuel Efficiency
Original Assignee : Hyundai Motors, Kia Motors
Priority date 2014-02-11
Abstract
The present invention, more particularly, sulfuric ash content is kept below 0.8% by weight, that as the exhaust gas protects the filter mounted to the process unit, and glyceryl monooleate of the ashless-type engine oil composition for improving the fuel economy, molybdenum dithiocarbamates and di-hydrocarbyl dithio because it contains the phosphate metal salt as a friction control agent at the s