Abstract: An additive for distillate and a fuel composition having improved cloud point depressant properties. The additive is incorporated into a major proportion of distillate fuel and is a maleic anhydride &agr;-olefin copolymer or a polyimide having the following structure: wherein R has at least 80% by weight of a hydrocarbon substituent from about 14 to about 16 carbons, X is oxygen or wherein N is nitrogen and R′ has at least 80% by weight of a hydrocarbon substituent from 16 to 18 carbons, and n is from about 2 to about 30 when X is oxygen, and from about 2 to about 17 when X is Alternatively, the cloud point additive can be an ethylene vinyl acetate isobutylene terpolymer.

Abstract: An additive for distillate fuels and a fuel composition having improved wax anti-settling properties. The additive is incorporated into a major proportion of distillate fuel and is a maleic anhydride &agr;-olefin copolymer or a imide having the following structure wherein R has at least 60% by weight of a hydrocarbon substituent from about 20 to about 40 carbon atoms, X is oxygen or wherein N is nitrogen and R′ has at least 80% by weight of a hydrocarbon substituent having from 16 to 18 carbon atoms, and n is from about 2 to about 8 for the maleic anhydride &agr;-olefin copolymer and from about 1 to about 8 for the imide. The additive can be combined with an ethylene vinyl acetate copolymer, ethylene vinyl acetate isobutylene terpolymer, or combinations thereof, to improve cold flow of the distillate fuel.

Abstract: An additive combination for distillate fuels and a fuel composition having improved cold flow properties. The additive combination is incorporated into a major proportion of distillate fuel and is comprised of an ethylene vinyl acetate isobutylene terpolymer in combination with one or more of a maleic anhydride &agr;-olefin copolymer component, a polyimide component, and an alkyl phenol component each having one or more hydrocarbon substituents within specified carbon number ranges. Optionally, an ethylene vinyl acetate copolymer may also be incorporated as a component therein.

Abstract: An additive for distillate and a fuel composition having improved cloud point depressant properties. The additive is incorporated into a major proportion of distillate fuel and is a maleic anhydride .alpha.-olefin copolymer or a polyimide having the following structure: ##STR1## wherein R has at least 80% by weight of a hydrocarbon substituent from about 14 to about 16 carbons, X is oxygen or ##STR2## wherein N is nitrogen and R' has at least 80% by weight of a hydrocarbon substituent from 16 to 18 carbons, and n is from about 2 to about 30 when X is oxygen, and from about 2 to about 17 when X is ##STR3## Alternatively, the cloud point additive can be an ethylene vinyl acetate isobutylene terpolymer.

Abstract: Terpolymers of ethylene, vinyl acetate and isobutylene as flow improvers in distillate fuels. The terpolymers have number average molecular weights in the range of about 1,600 to about 3,000, and weight average molecular weights in the range of about 4,000 to about 18,000. These terpolymers provide improved low temperature flow characteristics in middle distillate fuels.