Mobil Oil Corporation

Guy P Abramo

Angeline B Cardis

Jeffrey C Trewella

David A Blain

Noyes L Avery

Reaction products, in which aromatic acid bis(polyether ester) is added to succinimides, are effective antioxidants, dispersants, and detergents for fuels and lubricants.

Modified succinimides as dispersants and detergents and lubricant and

Deposits on intake valves in gasoline internal combustion engines are reduced by an additive for fuel compositions comprising a mixture of (1) a polyalkylene succinimide, (2) a polyalkylene and (3) a mineral oil. The invention also comprises a fuel composition made up of a major amount of liquid hydrocarbon fuel such as gasoline or diesel and a minor amount of the aforesaid mixture. In still another aspect the invention comprises a method for removing and/or preventing engine deposits which adversely affect the performance of gasoline powered engines by running the engine with a fuel containing an effective amount of the previously described mixture.

Polyalkylene succinimide deposit control additives and fuel compositions

A fuel additive having detergency, solubility and thermal stability is a mixture of polyalkenyl succinimides, polyalkylenes, i.e., polyisobutylene or polypropylene, an ester and a polyether; namely a polybutylene oxide, polypropylene oxide or polybutylene/polypropylene oxide copolymer, and an optional amount of a mineral oil or synthetic oil.

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Herndon, VA, United States of America

Guy P Abramo