COMPOSITIONS FOR CONTROL OF DEPOSITS,EXHAUST EMMISSIONS AND/OR FUEL CONSUMPTION IN INTERNAL COMBUSTION ENGINES

摘要

This invention relates to fuel additives and fuels containing such additives for minimizing induction system deposits and for controlling exhaust emissions from an internal combustion engine wherein the fuel additives contain at least the following components: (a) at least one fuel-soluble succinimide detergent/dispersant; (b) a fuel-soluble mineral oil having a viscosity in the range of 10 to 13 cSt at 100 DEG C; (c) unhydrogenated poly- alpha -olefin oligomer having a viscosity in the range of 5 to 10 cSt at 100 DEG C; and (d) aromatic hydrocarbon boiling in the range of 160 to 300 DEG C and having a viscosity in the range of 1.4 to 2.0 cSt at 25 DEG C; wherein the weight ratio of (d):(a) is at least 0.5:1, the weight ratio of (c):(a) is in the range of 0.1:1 to 3:1, the weight ratio of (b):(c) is in the range of 1:1 to 8:1, and wherein the weight ratio of (b)+(c);(a) is in the range of 1.5:1 to 2.5:1.