| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a fuel composition which can improve fuel economy by reducing engine friction. <P>SOLUTION: A middle distillate fuel composition comprises a friction modifying effective amount of a hydrocarbyl-substituted succinimide derived from maleic anhydride, polyisobutylene and ammonia; and a middle distillate fuel. <P>COPYRIGHT: (C)2013,JPO&INPIT |
