Additive useful in oleaginous compositions

Claim 1

A petroleum fuel composition comprising: a major amount of petroleum fuel and in the range of 0.001 to 0.5 wt. % of bis-oxazoline of a molar proportion of a hydrocarbon-substituted C 4 -C 10 mono unsaturated dicarboxylic acid material selected from the group consisting of dicarboxylic acid, ester and anhydrides thereof, having in the range of from about 8 to 49 carbon atoms in said hydrocarbon substituent; reacted with about two molar proportions of a 2,2-disubstituted-2-amino-1-alkanol having 2 to 3 hydroxy groups and containing a total of 4 to 8 carbons of the formula: ##STR4## wherein X is alkyl or hydroxy alkyl, said alkyl groups having 1 to 3 carbon atoms, and at least one of said X is a hydroxy alkyl group of the structure --(CH 2 ) n OH where n is 1 to 3; at a temperature in the range of about 140 to 240° C. for about 1/2 to 24 hours with the removal of about three molar proportions of water to thereby produce said bis-oxazoline having the structure ##STR5## wherein R is said hydrocarbon substituent and X is as defined above.