Lubricating oil compositions

A concentrate composition comprising or resulting from the admixing of:

• a) from 1 to less than 50 wt % of a base oil composition comprising one or more Group III base oils, one or more Group III+ base oils, one or more Group IV base oils, or a combination thereof;
• b) from 0.2 to 30 wt % of a functionalized olefin copolymer having an Mn in the range of from about 10,000 g/mol to about 35,000 g/mol;
• c) from 0.20 to 40 wt % of one or more detergents, wherein the detergent comprises:
• 1) at least one first calcium detergent having a first TBN of more than 100 mg KOH/g;
• 2) at least one second calcium detergent having a second TBN of 100 mg KOH/g or less;
• and
• 3) at least one magnesium detergent, where the difference between the first TBN and the second TBN is greater than or equal to 100 mg KOH/g;
• d) from 0.02 to 80 wt % of one or more dispersants (such as but not limited to PIBSA-PAM), wherein the dispersants comprise at least one borated dispersant and at least one non-borated dispersant (not including component ii);
• and
• e) a friction modifier composition comprising:
• from 0.02 to 40 wt % of a sulfurized fatty acid ester;
• and
• from 0.02 to 20 wt % of a molybdenum-containing compound;
• and
• f) from 0.02 to 20 wt %, from 1.0 to 10.0 wt %, from 2.0 to 8.0 wt %, or from 3.0 to 6.0 wt % of an amine or phenol based antioxidant;
• and
• g) optional additional components, such as friction modifiers (other than the sulfurized fatty acid ester friction modifier), anti-oxidants, pour point depressants, anti-foam agents, viscosity modifiers, corrosion inhibitors, anti-wear agents, extreme pressure additives, demulsifiers, seal compatibility agents, additive diluent base oils, C8 to C36 alpha olefins, etc.;
• wherein
• the concentrate composition comprises molybdenum in an amount in the range of from 500 to 2,000 ppm by weight, according to ASTM D4951;
• and
• the wt % of each component is based on the total weight of the concentrate composition.

A method for preparing a lubricating oil composition comprising combining:

• a) from 50 to 99 wt % of a base oil composition comprising one or more Group III base oils, one or more Group III+ base oils, one or more Group IV base oils, or a combination thereof;
• b) from 0.1 to 15 wt % of a functionalized olefin copolymer having an Mn in the range of from about 10,000 g/mol to about 35,000 g/mol;
• c) from 0.1 to 20 wt % of one or more detergents wherein the detergent comprises:
• i) at least one first calcium detergent having a first TBN of greater than 100 mg KOH/g;
• ii) at least one second calcium detergent having a second TBN of less than or equal to 100 mg KOH/g;
• and
• iii) at least one magnesium detergent;
• wherein the first TBN minus the second TBN is greater than or equal to 100 mg KOH/g;
• d) from 0.01 to 40 wt % of one or more dispersants, wherein the dispersants comprise:
• i) at least one borated dispersant;
• and
• ii) at least one non-borated dispersant;
• e) from 0.01 to 20 wt % of a sulfurized fatty acid ester;
• f) from 0.01 to 10 wt % of a molybdenum-containing compound;
• and
• g) from 0.01 to 10 wt % of an amine-based antioxidant, a phenol-based antioxidant, or a combination thereof;
• wherein
• the lubricating oil composition comprises molybdenum in an amount in the range of from 250 to 1,000 ppm;
• and
• the wt % of each component is based on the total weight of the lubricating oil composition.