Lubricating oil composition
AssigneeShell Oil Company
InventorsAlexander Mark Robert James Hellawell, Robert Wilkinson, Alexander Peter Dirk Massely, Robert Moir, Stuart Browning, Richard Thomas Bown, Sravani Gullapalli
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Abstract
Lubricating composition comprising (i) base oil and (ii) a Verkade base compound having the formula (1): wherein R1, R2 and R3 are each independently selected from hydrogen and saturated or unsaturated, straight chain or branched, C1-C22 alkyl groups. The lubricating composition of the present invention exhibits improved base number retention and oxidative stability, particularly in the presence of a biofuel such as fatty acid alkyl ester.
Claims15
A lubricating composition comprising (I) base oil and (ii) compound having the formula (1):
- wherein R1, R2 and R3 are each independently selected from hydrogen and saturated or unsaturated, straight chain or branched, C1-C22 alkyl groups.
A method for improving the base number retention of a lubricating oil composition used for lubricating a crankcase of an internal combustion engine fueled with a biofuel composition, wherein the biofuel composition is a biodiesel composition comprising a fatty acid alkyl ester, wherein the method comprises adding to the lubricating oil composition a compound of formula (1):
- wherein R1, R2 and R3 are each independently selected from hydrogen and saturated or unsaturated, straight chain or branched, C1-C22 alkyl groups.
Dependencies are inferred from the claim text.