| abstract |
The present invention relates to a low sulfur, low ash, low phosphorus lubricant composition and a method for lubricating an internal combustion engine, which can improve fuel efficiency and fuel efficiency and reduce wear and friction. The composition includes (a) a lubricating viscous oil, and (b) a condensation product of a material of formula I with an alcohol or amine having from 1 to about 150 carbon atoms and combinations thereof. . The lubricant composition has a sulfated ash content of up to about 1.0, a phosphorus content of up to about 0.08% by weight, and a sulfur content of up to about 0.4% by weight. |