An oil soluble polyester composition comprising a reaction product of: a hydrocarbyl-substituted succinic acylating agent, wherein the hydrocarbyl-substituted succinic acylating agent comprises a polyisobutenyl succinic anhydride in which the polyisobutenyl group has a number average molecular weight (M n) of from 500 to 5000; a tertiary amine compound selected from a tertiary monoamine having one of the following structures: wherein: (a) R 1 is selected from C 1-20 alkyl, C 5-20 cycloalkyl, C 6-20 aryl, 5- to 20-membered heteroaryl, and 5- to 20-membered heterocyclyl, and wherein the alkyl, cycloalkyl, aryl, heteroaryl, and heterocyclyl groups are optionally substituted; (b) R in each of the x and they groups is independently C 2-4 alkylene; and (c) x and y are independently an integer of 1 to 5; or wherein: (a) R 2 is hydrogen, C 1-4 alkyl, -NH-(C 6-10 aryl), -NH-(C 7-16 aralkyl), - O-(C 1-4 alkyl), -O-(C 6-10 aryl), or -O-(C 7-16 aralkyl); (b) R in each of the x and they groups is independently C 2-4 alkylene; and (c) x and y are independently an integer of 1 to 5; or wherein: (a) R in each of the x and the y groups is independently C 2-4 alkylene; (b) x and y are independently an integer of 1 to 5; (c) Z is CH 2, O, S, N-(C 1-4 alkyl), or N-(C 6-10 aryl); (d) m is an integer of 1 to 3; and (e) n is an integer of 1 to 6; or wherein: (a) R in each of the x, y and z groups is independently C 2-4 alkylene; (b) x, y and z are independently an integer of 1 to 5; and (c) Ar is optionally substituted C 6-20 aryl; or, or a tertiary diamine having the following structure: wherein: (a) R in each of the x and the y groups is independently C 2-4 alkylene; (b) x and y are independently an integer of 1 to 5; and (c) q is an integer of 1, 2, or 3; and combinations thereof; and a poly(oxyalkylene) polyol having from 2 to 15 C 2-4 alkylene oxide units per molecule. a hydrocarbyl-substituted succinic acylating agent, wherein the hydrocarbyl-substituted succinic acylating agent comprises a polyisobutenyl succinic anhydride in which the polyisobutenyl group has a number average molecular weight (M n) of from 500 to 5000; a tertiary amine compound selected from a tertiary monoamine having one of the following structures: wherein: (a) R 1 is selected from C 1-20 alkyl, C 5-20 cycloalkyl, C 6-20 aryl, 5- to 20-membered heteroaryl, and 5- to 20-membered heterocyclyl, and wherein the alkyl, cycloalkyl, aryl, heteroaryl, and heterocyclyl groups are optionally substituted; (b) R in each of the x and they groups is independently C 2-4 alkylene; and (c) x and y are independently an integer of 1 to 5; or wherein: (a) R 2 is hydrogen, C 1-4 alkyl, -NH-(C 6-10 aryl), -NH-(C 7-16 aralkyl), - O-(C 1-4 alkyl), -O-(C 6-10 aryl), or -O-(C 7-16 aralkyl); (b) R in each of the x and they groups is independently C 2-4 alkylene; and (c) x and y are independently an integer of 1 to 5; or wherein: (a) R in each of the x and the y groups is independently C 2-4 alkylene; (b) x and y are independently an integer of 1 to 5; (c) Z is CH 2, O, S, N-(C 1-4 alkyl), or N-(C 6-10 aryl); (d) m is an integer of 1 to 3; and (e) n is an integer of 1 to 6; or wherein: (a) R in each of the x, y and z groups is independently C 2-4 alkylene; (b) x, y and z are independently an integer of 1 to 5; and (c) Ar is optionally substituted C 6-20 aryl; or, or a tertiary diamine having the following structure: wherein: (a) R in each of the x and the y groups is independently C 2-4 alkylene; (b) x and y are independently an integer of 1 to 5; and (c) q is an integer of 1, 2, or 3; and combinations thereof; and (a) R 1 is selected from C 1-20 alkyl, C 5-20 cycloalkyl, C 6-20 aryl, 5- to 20-membered heteroaryl, and 5- to 20-membered heterocyclyl, and wherein the alkyl, cycloalkyl, aryl, heteroaryl, and heterocyclyl groups are optionally substituted; (b) R in each of the x and they groups is independently C 2-4 alkylene; and (c) x and y are independently an integer of 1 to 5; or (a) R 2 is hydrogen, C 1-4 alkyl, -NH-(C 6-10 aryl), -NH-(C 7-16 aralkyl), - O-(C 1-4 alkyl), -O-(C 6-10 aryl), or -O-(C 7-16 aralkyl); (b) R in each of the x and they groups is independently C 2-4 alkylene; and (c) x and y are independently an integer of 1 to 5; or (a) R in each of the x and the y groups is independently C 2-4 alkylene; (b) x and y are independently an integer of 1 to 5; (c) Z is CH 2, O, S, N-(C 1-4 alkyl), or N-(C 6-10 aryl); (d) m is an integer of 1 to 3; and (e) n is an integer of 1 to 6; or (a) R in each of the x, y and z groups is independently C 2-4 alkylene; (b) x, y and z are independently an integer of 1 to 5; and (c) Ar is optionally substituted C 6-20 aryl; or, or a tertiary diamine having the following structure: wherein: (a) R in each of the x and the y groups is independently C 2-4 alkylene; (b) x and y are independently an integer of 1 to 5; and (c) q is an integer of 1, 2, or 3; and combinations thereof; and (a) R in each of the x and the y groups is independently C 2-4 alkylene; (b) x and y are independently an integer of 1 to 5; and (c) q is an integer of 1, 2, or 3; and combinations thereof; and a poly(oxyalkylene) polyol having from 2 to 15 C 2-4 alkylene oxide units per molecule.