MULTIGRADE LUBRICATING COMPOSITIONS

摘要

The invention relates to a method of lubricating a mechanical device (such as an internal combustion engine) with a lubricating composition. The invention further relates to the use of the lubricating composition for an internal combustion engine to provide improved fuel economy and providing at least one of (i) wear reduction, (ii) control of corrosion, (iii) cleanliness, and (iv) soot control.

主权项

1. A multigrade lubricant composition, comprising:
(a) an oil of lubricating viscosity having a viscosity index of at least 110 or 120 to 140 or 150; (b) an ashless dispersant; and (c) an overbased metal detergent wherein the lubricating composition contains less than 0.01 weight percent of a polymeric viscosity index improver; wherein the lubricant composition has a SAE viscosity grade of XW-Y, wherein X may be 0, 5, or 10; and Y may be 16, 20, 26, 30, or 40.