Fuel oil with added polymer of alkyl ester

Abstract From the Canadian patent

Polymers or copolymers containing an n-alkyl ester of a a mono-ethylenically unsaturated C4 to C8 monoor dicarboxylic acid wherein the average number of carbon atoms in the n-alkyl groups is from 12 to 14 and, which contain no more than 10 wt.% of comonomer containing alkyl groups containing more than 14 carbon atoms and preferably no more than 20 wt.% of comonomer in which the alkyl group contains fewer than 12 carbon atoms are low temperature flow improvers for distillate fuels improving flow and filterability as well as lowering cloud point.