Additive concentrates for the formulation of lubricating oil compositions

A lubricant additive concentrate comprising:

• (i) dispersant that is the polybutenyl succinimide reaction product of a polyamine and polybutenyl succinic anhydride (PIBSA) having a functionality of from about 1.3 to about 2.2, derived from polybutene having a number average molecular weight (Mn) of from about 1300 to about 2500 daltons and a terminal vinylidene content of at least about 50% and maleic anhydride via an ene maleation process;
• (ii) overbased magnesium colloidal detergent having a total base number (TBN) of from about 300 to about 900 mg KOH/g;
• (iii) organic friction modifier comprising organic friction modifier selected from:
• at least one hydroxyalkyl alkyl amines of C14 to C24 hydrocarbons,
• at least one hydroxyalkyl alkyl ether amines of C13 to C24 hydrocarbons,
• at least one alkyl ester amine derived from triethanol amine having a C13 to C24 hydrocarbyl substituent,
• at least one non-basic, fatty acid amide, or a mixture thereof;
• and
• (iv) glycerol mono-oleate;
• wherein:
• a) the combined mass % of dispersant (i) and overbased magnesium colloidal detergent (ii) in said concentrate is from about 15 to about 50 mass %;
• b) the mass ratio of (i):(ii) is from about 1:1 to about 6:1;
• c) said concentrate contains from about 2 mass % to about 10 mass % of organic friction modifier (iii);
• d) the remainder of the concentrate comprises base oil and additives other than dispersant (i), overbased magnesium colloidal detergent (ii) and organic friction modifier (iii);
• e) the total concentration of mixture of organic friction modifier (iii), glycerol mono-oleate, and organic friction modifier other than (iii) in the concentrate is from about 4 mass % to about 10 mass %;
• and
• f) said lubricant additive concentrate has a sediment content of no greater than 0.05 mass %, based on the total mass of the concentrate after 12 weeks of storage at 60° C.

A lubricant additive concentrate comprising:

• (i) dispersant that is the polybutenyl succinimide reaction product of a polyamine and polybutenyl succinic anhydride (PIBSA) having a functionality of from about 1.3 to about 2.2, derived from polybutene having a number average molecular weight (Mn) of from about 1300 to about 2500 daltons and a terminal vinylidene content of at least about 50% and maleic anhydride via an ene maleation process;
• (ii) overbased magnesium colloidal detergent having a total base number (TBN) of from about 300 to about 900 mg KOH/g;
• (iii) organic friction modifier comprising organic friction modifier selected from:
• at least one hydroxyalkyl alkyl amines of C14 to C24 hydrocarbons,
• at least one hydroxyalkyl alkyl ether amines of C13 to C24 hydrocarbons,
• at least one alkyl ester amine derived from triethanol amine having a C13 to C24 hydrocarbyl substituent,
• at least one non-basic, fatty acid amide, or a mixture thereof;
• (iv) glycerol mono-oleate;
• and
• (v) natural diluent oil selected having a kinematic viscosity at 100° C. of about 2 to about 40 mm2/sec;
• wherein:
• a) the combined mass % of dispersant (i) and overbased magnesium colloidal detergent (ii) in said concentrate is from about 15 to about 50 mass %;
• b) the mass ratio of (i):(ii) is from about 1:1 to about 6:1;
• c) said concentrate contains from about 2 mass % to about 10 mass % of organic friction modifier (iii);
• d) the remainder of the concentrate comprises base oil and additives other than dispersant (i), overbased magnesium colloidal detergent (ii) and organic friction modifier (iii);
• e) the total concentration of mixture of organic friction modifier (iii), glycerol molo-oleate, and organic friction modifier other than (iii) in the concentrate is from about 4 mass % to about 10 mass %;
• and
• f) said lubricant additive concentrate has a sediment content of no greater than 0.05 mass %, based on the total mass of the concentrate after 12 weeks of storage at 60° C.