Patent ID: 9574150
Date: 2017-02-21
CPC Classifications: C10L

Claim:
1. A synergistic fuel additive composition that provides a fuel conductivity ranging from at least about 500 pS/m to about 2000 pS/m at about 20° to about 25° C. according to ASTM 2624 in a middle distillate fuel, the synergistic fuel additive composition comprising: a) from about 20 to about 40 ppm by weight of a hydrocarbyl-substituted succinimide having the formula wherein n is 3, and R 2 is a polyisobutenyl substituent derived from polyisobutylenes having at least 60 mole % and above terminal vinylidene content; and b) from about 20 to about 40 ppm by weight of a reaction product of (i) aminoguanidine or salt thereof and (ii) a polyisobutenyl-substituted dicarboxylic acid, or polyisobutenyl-substituted anhydride, wherein the polyisobutenyl group has 60 mole % or more terminal vinylidene groups and a number average molecular weight ranging from about 100 to about 5000 as measured by gel permeation chromatography (GPC); and wherein a weight ratio of (a) to (b) ranges from about 2:1 to about 1:2.