Patent ID: 8690970

Claim:
A fuel composition for a fuel injected internal combustion engine comprising: a major amount of fuel and a minor, effective amount of a quaternary ammonium salt from the reaction of a tertiary amine and a hydrocarbyl-substituted alkyl-hydroxybenzoate of the formula wherein R 6 is a hydrocarbyl group, and n is a number from 1 to 3, wherein the total carbon atoms of all of the R 6 groups is at least 8 up to about 200 and R 6 does not contain N, S or O atoms, and R 7 is an alkyl group containing from 1 to 4 carbon atoms, wherein the amount of quaternary ammonium salt present in the fuel is sufficient to improve performance of the fuel injected internal combustion engine having combusted said composition compared to the performance of said engine having combusted a fuel composition that does not contain said quaternary ammonium salt, and wherein the hydrocarbyl-substituted alkyl-hydroxybenzoate contains one or more hydrocarbyl substituents providing a total of at least 8 up to about 200 carbon atoms, provided the one or more hydrocarbyl substituents do not contain sulfur, oxygen, or nitrogen atoms.