| 摘要 |
A lubricating composition comprising: (a) a 2 mm2/s to about 12 mm2/s light neutral base oil; (b) 0 to 20 weight percent of a heavy neutral base oil or a brightstock with a viscosity of above about 12 mm2/s to about 40 mm2/s; and (c) at least one performance additive comprising: a polymeric thickener, a dispersant, an antiwear agent, a detergent or mixtures thereof, wherein the polymeric thickener when present has a weight average molecular weight (Mw) of more than 8000 and is present in an amount to provide a total viscosity of the composition of about 12 mm2/s to about 29 mm2/s; the dispersant or detergent when present imparts basicity to said lubricating composition; and the composition has a total base number of at least about 10 mg KOH/g. The invention further provides a method of making the compositions and its use for lubricating an internal combustion engine.
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