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|1. (WO2018144166) LUBRICATING ENGINE OIL AND METHOD FOR IMPROVING ENGINE FUEL EFFICIENCY|
|Applicants:||EXXONMOBIL RESEARCH AND ENGINEERING COMPANY
|Inventors:||DECKMAN, Douglas, E.
GAAL, Dennis, A.
PATEL, Mrugesh, N.
|Title:||LUBRICATING ENGINE OIL AND METHOD FOR IMPROVING ENGINE FUEL EFFICIENCY|
A method for improving fuel efficiency and reducing frictional properties while maintaining or improving deposit control, in an engine lubricated with a lubricating oil by using as the lubricating oil a formulated oil. The formulated oil has a composition including from 75 to 95 wt% of lubricating oil base stock including a Group I base stock or a combination of a Group III, Group IV and Group V base stock including from 30 to 35 wt% Group III, 45 to 55 wt% Group IV and 0 to 5 wt% Group V and a friction modifier mixture comprising a polymeric ethoxylated fatty acid ester at from 0.1 to 1.0 wt.% and a mixed glyceride ester at from 0.1 to 1.0 wt.% of the formulated oil. The lubricating engine oils are useful in internal combustion engines including direct injection, gasoline and diesel engines.