Gasoline detergent compositions

摘要

A gasoline comprising: (i) from 10 to 5000 ppm by weight of a polyisobutenyl succinimide wherein the polyisobutenyl substituent has a number average molecular weight (Mn) in the range 500 to 5000; (ii) from 10 to 5000 ppm by weight of a polyalkylene glycol of formula R'-O-(RO)n-R'' wherein R' and R'' independently represent hydrogen atoms or hydrocarbyl groups of up to 30 carbon atoms, having a molecular weight in the range 500 to 5000 and R represents a C2-8 alkylene radical; and (iii) from 10 to 5000 ppm by weight of a poly(C2-C6 olefin) wherein the polyolefin has a number average molecular weight (Mn) of 300 to 5000, and additive compositions for use in the preparation thereof.