公开(公告)号：US20180037841A1

公开(公告)日：2018-02-08

申请号：US15667066

申请日：2017-08-02

Applicant: ExxonMobil Research and Engineering Company

Inventor： Michael L. Alessi ,  Steven M. Jetter ,  Steven Kennedy ,  Sarah E. Parker ,  Van An Du

IPC: C10M169/04 ,  C10M159/12 ,  C10M101/02

CPC classification number: C10M169/041 ,  C10M101/02 ,  C10M133/56 ,  C10M149/06 ,  C10M159/12 ,  C10M2203/003 ,  C10M2203/1006 ,  C10M2203/1025 ,  C10M2205/022 ,  C10M2205/0285 ,  C10M2207/34 ,  C10M2215/28 ,  C10M2217/043 ,  C10M2217/06 ,  C10N2230/02 ,  C10N2230/06 ,  C10N2230/54 ,  C10N2230/68 ,  C10N2240/10 ,  C10N2240/102 ,  C10N2240/104 ,  F01M9/02 ,  C10N2220/022 ,  C10M2205/024 ,  C10M2209/084 ,  C10N2260/09 ,  C10M2205/08 ,  C10M2209/086

Abstract: Provided are lubricating engine oils including a lubricating oil base stock as a major component having a base oil viscosity at 100 deg. C. ranging from 4.5 to 7.5 cSt, and a carboxylic functionalized polymer dispersant with aromatic amine functionality, as a minor component, wherein the lubricating engine oils have a cold crank simulator viscosity at −30 deg. C. of less than 8500 mPa·s. The lubricating engine oils may provide improved engine wear protection at equivalent fuel efficiency or improved fuel efficiency at equivalent engine wear protection compared to a lubricating engine oil containing a dispersant as a minor component other than the carboxylic functionalized polymer with aromatic amine functionality. Methods of making the lubricating engine oil are also provided. The lubricating engine oils are useful in internal combustion engines including direct injection, gasoline and diesel engines.