Method for improving engine fuel efficiency (ExxonMobil)

CATEGORY: LUBRICANTS 
Method for improving engine fuel efficiency (ExxonMobil)

Type	Patent
Inventor	Smruti A. Dance
Inventor	Douglas Edward Deckman
URL	Free Full Text Source:  http://www.google.com/patents/US20140194333
Extra	SUMMARY This disclosure relates in part to a method for improving fuel efficiency, while maintaining or improving wear protection (e.g., high temperature wear, deposit and varnish control), in an engine lubricated with a lubricating oil by including at least one alkoxylated alcohol in the lubricating oil. The lubricating oils of this disclosure are useful in internal combustion engines including direct injection, gasoline and diesel engines. This disclosure also relates in part to a method for improving fuel efficiency, while maintaining or improving high temperature wear, deposit and varnish control, in an engine lubricated with a lubricating oil by using as the lubricating oil a formulated oil. The formulated oil has a composition comprising a lubricating oil base stock as a major component; and at least one alkoxylated alcohol, as a minor component. Fuel efficiency is improved and high temperature wear, deposit and varnish control are maintained or improved as compared to high temperature wear, deposit and varnish control achieved using a lubricating engine oil containing a minor component other than the at least one alkoxylated alcohol. This disclosure further relates in part to a lubricating engine oil having a composition comprising a lubricating oil base stock as a major component; and at least one alkoxylated alcohol, as a minor component. Fuel efficiency is improved and high temperature wear, deposit and varnish control are surprisingly maintained or improved as compared to high temperature wear, deposit and varnish control achieved using a lubricating engine oil containing a minor component other than the at least one alkoxylated alcohol. It has been surprisingly found that, in accordance with this disclosure, improvements in fuel economy are obtained without sacrificing engine durability (e.g., while maintaining or improving high temperature wear, deposit and varnish control) in an engine lubricated with a lubricating oil, by including at least one alkoxylated alcohol in the lubricating oil. Other objects and advantages of the present disclosure will become apparent from the detailed description that follows.
Assignee	Exxonmobil Research And Engineering Company
Issue Date	Jul 10, 2014
Abstract	A method for improving fuel efficiency, while maintaining or improving high temperature wear, deposit and varnish 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 a lubricating oil base stock as a major component, and at least one alkoxylated alcohol as a minor component. Fuel efficiency is improved and high temperature wear, deposit and varnish control are maintained or improved as compared to high temperature wear, deposit and varnish control achieved using a lubricating engine oil containing a minor component other than the at least one alkoxylated alcohol. A lubricating engine oil having a composition including a lubricating oil base stock as a major component, and at least one alkoxylated alcohol as a minor component. The lubricating engine oils are useful in internal combustion engines including direct injection, gasoline and diesel engines.