汽油机油的低中速行车试验

FIELD TESTS OF GASOLINE ENGINE OILS UNDER MID LOW SPEED CONDITION

汽油机油（ＳＥ和ＳＦ级）用国产轿车在低中速和长换油期的行驶条件下进行行车试验，考察试油生成低温沉积物的倾向、合理的换油期以及对车辆的适应性。试验结果认为，ＳＥ级油采用１０００ｋｍ，ＳＦ级油采用１２０００～１５０００ｋｍ的换油期是可行的。

The field tests of gasoline engine oils (SE and SF grades) were conducted under conditions of mid low speed and long drain period. The object was to inspect their low temperature performance, tendency of sludge formation and the reasonable drain period as well as their adaptabilities to the cars.