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US 2026/0152698 A1Published application
Lubricant compositions and methods of lubricating internal combustion engines
AssigneeThe Lubrizol Corporation
InventorsMathew Philip Robin, Paul Martin Spencer Kirkman, David M. Hobson, David J. Growney, Brittany R. Richards, Joanne Searle, Daniel J. Saccomando
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Abstract
A lubricating composition containing saturated primary monohydric alcohol and a dispersant is provided. The saturated primary monohydric alcohol provides a metal-free, ashless additive that aids in oxidation and deposit control as well as the resulting undesirable viscosity increase.
Claims43
A lubricating composition comprising:
- (a) an oil of lubricating viscosity, wherein the oil of lubricating viscosity comprises at least 40% by weight of Group I, Group II, or Group III base oils or mixtures thereof and wherein the lubricating composition contains less than 50% by weight of a polyalphaolefin base oil;
- (b) 1 wt % to 5 wt % of a saturated, primary monohydric alcohol having 10 to 32 carbon atoms, or 10 to 30 carbon atoms, or 12 to 26 carbon atoms, or 14 to 16 carbon atoms;
- (c) less than 3 wt % (less than 2.5% or less than 2%) of an aryl amine antioxidant;
- (d) 0.5 wt % to 8 wt % or 1 wt % to 6 wt % or 1.75 wt % to 5 wt % of a dispersant.
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Dependencies are inferred from the claim text.