| 摘要 |
Lubricating oil composition having a sulphur content of from 0.01 to 0.3 wt. %, a phosphorus content of from 0.01 to 0.1 wt. % and a sulphated ash content of from 0.1 to 1.2 wt. %, based on the total weight of the lubricating oil composition is provided. The lubricating oil composition contains a mineral and/or synthetic base oil and one or more compounds of formula I, wherein R is an optionally substituted branched or straight chain alkyl group containing from 3 to 50 carbon atoms; R1 is hydrogen or an optionally substituted branched or straight chain alkyl group containing from 1 to 50 carbon atoms; n is an integer equal to or greater than 1, and m is also an integer equal to or greater than 1; and X is an integer from 2 to 10,000. A method of improving engine cleanliness in diesel, gas-fuelled or gasoline engine applications using such composition is also provided.
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