Hydrocarbon oils with improved pour points

An oil composition comprised of a hydrocarbon fuel oil and a terpolymer of about 20 to 45 parts by weight of units of a least one vinyl ester containing 4 to 6 total carbon atoms, about 1 to 5 parts by weight of vinyl alcohol units and about 50 to 75 parts of ethylene units, said terpolymer having a weight average molecular weight of about 3,000 to 50,000 and being present in the composition at a concentration of about 0.005 to 1%, based on the total weight of the composition.

In a method of depressing the pour point of a hydrocarbonaceous oil comprising incorporating into the hydrocarbonaceous oil a polymeric component, the improvement comprising using as the polymeric component a terpolymer comprised of about 15 to 50 parts by weight of units of at least one vinyl ester, about 0.1 to 10 parts by weight of vinyl alcohol units and about 75 to 49 parts by weight of ethylene units per 100 parts by weight of terpolymer, said terpolymer having a weight average molecular weight of about 1,000 to 100,000.

In a method of depressing the pour point of a hydrocarbonaceous oil comprising incorporating into the hydrocarbonaceous oil a polymeric component, the improvement comprising using as the polymeric component a terpolymer comprised of about 20 to 45 parts by weight of units of at least one vinyl ester containing 4 to 6 total carbon atoms, about 1 to 5 parts by weight of vinyl alcohol units and about 50 to 75 parts of ethylene units, said terpolymer having a weight average molecular weight of about 3,000 to 50,000 and being present at a concentration of about 0.005 to 1%, based on the total weight of hydrocarbonaceous oil and polymeric component.