QUATERNARY AMMONIUM SALT CONTAINING COMPOSITIONS THAT PROVIDE BALANCED DEPOSIT CONTROL AND WEAR PERFORMANCE WITHOUT SEAL COMPATABILITY ISSUES

摘要

The invention relates to lubricating compositions, processes of making such lubricating compositions, and method of using such lubricating compositions. The lubricating compositions of the present invention include a dispersant comprising a quaternary ammonium salt, a phosphorus-containing compound, a metal dialkyldithiophosphate, a derivative of a hydroxyl carbonyl compound and an amine and/or an alcohol. These compositions provide balanced deposit control and wear performance without causing any seal compatibility issues.