ORI-inhibited motor fuel composition and storage stable concentrate.

摘要

A motor fuel composition which inhibits engine ORI and intake valve deposit formation comprises a mixture of hydrocarbons boiling in the range of 90 DEG F-450 DEG (32 to 232 DEG C) and an additive compressing the reaction product of (a) 1.5 to 2.5 moles of a hydrocarbyl-substituted dibasic acid anhydride of the formula wherein R1 is a hydrocarbyl radical having a molecular weight of 500 to 10,000 and y is 0 tol 3; and (b) 0.5 to 1.5 moles of a polyoxyalkylene diamine of the formula These motor fuel compositions show improved ORI control in comparison with typical commercial fuel compositions. The additives are advantageous in that they may be produced and stored as precipitation-resistant concentrates. i