Back to results
US 10,704,009 B2Granted
Ultra low ash lubricating oil compositions
AssigneeChevron Oronite Company LLC
InventorsJohn Robert Miller, Kevin David Carabell
Life of this patent
Estimating the term…
Abstract
The present disclosure generally relates to a lubricating oil composition having a sulfur content of up to 0.4 wt. % and a sulfated ash content of up to 0.6 wt. %, as determined by ASTM D874, comprising: a major amount of base oil; at least 0.02 wt. % of triazole compound; less than about 1.3 wt. % of a diphenylamine antioxidant; and at least 900 ppm of molybdenum from a molybdenum containing compound; wherein the lubricating oil composition is essentially free of ZnDTP. Also provided are methods for reducing wear and copper corrosion in an engine which is equipped with a diesel particulate filter (DPF) or a gasoline particulate filter (GPF) after treatment device system.
Claims20
A lubricating oil composition having a sulfur content of up to 0.4 wt. % and a sulfated ash content of up to 0.6 wt. % as determined by ASTM D874, comprising:
- a. a major amount of base oil;
- b. at least 0.02 wt. % to about 1.0 wt. %, based on the total weight of the lubricating oil composition, of a triazole compound represented by the following structure:
- wherein n is 1, R is a hydrocarbyl group and Y is hydrogen, —R1 or —(R2)p—NR3R3 where —R1 is a hydrocarbyl group, —R2 is a hydrocarbylene group, p is 0 or 1, and each —R3 is independently hydrogen or hydrocarbyl group, and wherein the triazole compound has a molecular weight of about 70 to about 1000 g/mol;
- and;
- c. about 0.20 to 1.3 wt. %, based on the total weight of the lubricating oil composition, of a diphenylamine antioxidant;
- d. at least 900 ppm of molybdenum from a molybdenum containing compound;
- and
- e. about 100 to 4000 ppm of sulfur derived from an ashless sulfur containing wear inhibitor;
- wherein the lubricating oil composition is essentially free of ZnDTP.
6 more elements
A method for improving copper corrosion performance in an engine comprising:
- (i) lubricating said engine with a lubricating oil composition having a sulfur content of up to 0.4 wt. % and a sulfated ash content of up to 0.6 wt. % as determined by ASTM D874, comprising:
- a. a major amount of base oil;
- b. at least 0.02 wt. % to about 1.0 wt. %, based on the total weight of the lubricating oil composition, of triazole compound represented by the following structure:
- wherein n is 1, R is a hydrocarbyl group and Y is hydrogen, —R1 or —(R2)p—NR3R3 where —R1 is a hydrocarbyl group, —R2— is a hydrocarbylene group, p is 0 or 1, and each —R3 is independently hydrogen or hydrocarbyl group, and wherein the triazole compound has a molecular weight of about 70 to about 1000 g/mol;
- c. about 0.20 to 1.3 wt. %, based on the total weight of the lubricating oil composition, of a diphenylamine antioxidant;
- d. at least 900 ppm of molybdenum from a molybdenum containing compound;
- and
- e. about 100 to 4000 ppm of sulfur derived from an ashless sulfur containing wear inhibitor;
- wherein the lubricating oil composition is essentially free of ZnDTP, and
- (ii) operating said engine,
- wherein the engine is equipped with a diesel particulate filter (DPF) after treatment device system.
8 more elements
A method for improving copper corrosion performance in an engine comprising:
- (i) lubricating said engine with a lubricating oil composition having a sulfur content of up to 0.4 wt. % and a sulfated ash content of up to 0.6 wt. % as determined by ASTM D874, comprising:
- e. a major amount of base oil;
- f. at least 0.02 wt. % to about 1.0 wt. %, based on the total weight of the lubricating oil composition, of triazole compound represented by the following structure:
- wherein n is 1, R is a hydrocarbyl group and Y is hydrogen, —R1 or —(R2)p—NR3R3 where —R1 is a hydrocarbyl group, —R2— is a hydrocarbylene group, p is 0 or 1, and each —R3 is independently hydrogen or hydrocarbyl group, and wherein the triazole compound has a molecular weight of about 70 to about 1000 g/mol;
- g. about 0.20 to 1.3 wt. %, based on the total weight of the lubricating oil composition, of a diphenylamine antioxidant;
- h. at least 900 ppm of molybdenum from a molybdenum containing compound;
- and
- i. about 100 to 4000 ppm of sulfur derived from an ashless sulfur containing wear inhibitor;
- wherein the lubricating oil composition is essentially free of ZnDTP, and
- (ii) operating said engine,
- wherein the engine is equipped with a gasoline particulate filter (GPF) after treatment device system.
8 more elements
A method for reducing wear while at the same time improving copper corrosion performance in an engine comprising:
- (i) lubricating said engine with a lubricating oil composition having a sulfur content of up to 0.4 wt. % and a sulfated ash content of up to 0.6 wt. % as determined by ASTM D874, comprising:
- a. a major amount of base oil;
- b. at least 0.02 wt. % to about 1.0 wt. %, based on the total weight of the lubricating oil composition, of triazole compound represented by the following structure:
- wherein n is 1, R is a hydrocarbyl group and Y is hydrogen, —R1 or —(R2)p—NR3R3 where —R1 is a hydrocarbyl group, —R2— is a hydrocarbylene group, p is 0 or 1, and each —R3 is independently hydrogen or hydrocarbyl group, and wherein the triazole compound has a molecular weight of about 70 to about 1000 g/mol;
- c. about 0.20 to 1.3 wt. %, based on the total weight of the lubricating oil composition, of a diphenylamine antioxidant;
- d. at least 900 ppm of molybdenum from a molybdenum containing compound;
- and
- e. about 100 to 4000 ppm of sulfur derived from an ashless sulfur containing wear inhibitor;
- wherein the lubricating oil composition is essentially free of ZnDTP, and
- (ii) operating said engine,
- wherein the engine is equipped with a diesel particulate filter (DPF) after treatment device system.
8 more elements
A method for reducing wear while at the same time improving copper corrosion performance in an engine comprising:
- (i) lubricating said engine with a lubricating oil composition of having a sulfur content of up to 0.4 wt. % and a sulfated ash content of up to 0.6 wt. % as determined by ASTM D874, comprising:
- m. a major amount of base oil;
- n. at least 0.02 wt. % to about 1.0 wt. %, based on the total weight of the lubricating oil composition, of triazole compound represented by the following structure:
- wherein n is 1, R is a hydrocarbyl group and Y is hydrogen, —R1 or —(R2)p—NR3R3 where —R1 is a hydrocarbyl group, —R2— is a hydrocarbylene group, p is 0 or 1, and each —R3 is independently hydrogen or hydrocarbyl group, and wherein the triazole compound has a molecular weight of about 70 to about 1000 g/mol;
- o. about 0.20 to 1.3 wt. %, based on the total weight of the lubricating oil composition, of a diphenylamine antioxidant;
- p. at least 900 ppm of molybdenum from a molybdenum containing compound;
- and
- q. about 100 to 4000 ppm of sulfur derived from an ashless sulfur containing wear inhibitor;
- wherein the lubricating oil composition is essentially free of ZnDTP, and
- (ii) operating said engine,
- wherein the engine is equipped with a gasoline particulate filter (GPF) after treatment device system.
8 more elements
Dependencies are inferred from the claim text.