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1. (WO2017192217) LUBRICANTS FOR USE IN BOOSTED ENGINES

Pub. No.:    WO/2017/192217    International Application No.:    PCT/US2017/023622
Publication Date: Fri Nov 10 00:59:59 CET 2017 International Filing Date: Thu Mar 23 00:59:59 CET 2017
IPC: C10M 163/00
C10M 171/00
C10N 40/25
C10N 10/04
C10N 30/08
C10N 30/10
Applicants: AFTON CHEMICAL CORPORATION
Inventors: YANG, Kongsheng
FLETCHER, Kristin
LAM, William Y.
STYER, Jeremy
Title: LUBRICANTS FOR USE IN BOOSTED ENGINES
Abstract:
A lubricating oil composition and method of operating a boosted internal combustion engine. The lubricating oil composition includes greater than 50 wt.% of a base oil of lubricating viscosity, calcium, nitrogen, molybdenum and boron. The weight ratio of Ca:N (ppm/ppm) in the lubricating oil composition is greater than 1.3 to less than 3.0, the weight ratio of Ca:Mo (ppm/ppm) in the lubricating oil composition is greater than 6.7 to less than 56.3, and the weight ratio of Ca:B (ppm/ppm) in the lubricating oil composition is greater than 5.0 to less than 9.8. The lubricating oil composition does not contain added magnesium from a magnesium-containing detergent. The lubricating oil composition is resistant to deposit formation in the boosted internal combustion engine, as shown by its ability to ensure a TCO Temperature Increase of less than 9.0% as measured using the 2015 version of the General Motors dexos1® Turbocharger Coking Test.