Fuel additive compositions containing poly(oxyalkylene) hydroxyaromatic ethers and aliphatic amines

A fuel composition comprising a major amount of hydrocarbons boiling in the gasoline or diesel range and an effective detergent amount of a fuel additive composition comprising:

• (a) a poly(oxyalkylene) hydroxyaromatic ether having the formula:
• ##STR40## or a fuel-soluble salt thereof;
• wherein R.sub.1 and R.sub.2 are each independently hydrogen, hydroxy, lower alkyl having 1 to 6 carbon atoms, or lower alkoxy having 1 to 6 carbon atoms;
• R.sub.3 and R.sub.4 are each independently hydrogen or lower alkyl having 1 to 6 carbon atoms;
• R.sub.5 is hydrogen, alkyl having 1 to 30 carbon atoms, phenyl, aralkyl or alkaryl having 7 to 36 carbon atoms, or an acyl group of the formula:
• ##STR41## wherein R.sub.6 is alkyl having 1 to 30 carbon atoms, phenyl, or aralkyl or alkaryl having 7 to 36 carbon atoms;
• n is an integer from 5 to 100;
• and x is an integer from 0 to 10;
• and
• (b) an aliphatic substituted amine having at least one basic nitrogen atom and containing an aliphatic hydrocarbyl group which has sufficient molecular weight and carbon chain length to render the aliphatic substituted amine soluble in hydrocarbons boiling in the gasoline or diesel range.

A fuel concentrate comprising an inert stable oleophilic organic solvent boiling in the range of from about 150.degree. F. to 400.degree. F. and from about 10 to about 70 weight percent of a fuel additive composition comprising:

• (a) a poly(oxyalkylene) hydroxyaromatic ether having the formula:
• ##STR42## or a fuel-soluble salt thereof;
• wherein R.sub.1 and R.sub.2 are each independently hydrogen, hydroxy, lower alkyl having 1 to 6 carbon atoms, or lower alkoxy having 1 to 6 carbon atoms;
• R.sub.3 and R.sub.4 are each independently hydrogen or lower alkyl having 1 to 6 carbon atoms;
• R.sub.5 is hydrogen, alkyl having 1 to 30 carbon atoms, phenyl, aralkyl or alkaryl having 7 to 36 carbon atoms, or an acyl group of the formula:
• ##STR43## wherein R.sub.6 is alkyl having 1 to 30 carbon atoms, phenyl, or aralkyl or alkaryl having 7 to 36 carbon atoms;
• n is an integer from 5 to 100;
• and x is an integer from 0 to 10;
• and
• (b) an aliphatic substituted amine having at least one basic nitrogen atom and containing an aliphatic hydrocarbyl group which has sufficient molecular weight and carbon chain length to render the aliphatic substituted amine soluble in hydrocarbons boiling in the gasoline or diesel range.