GASOLINE COMPOSITIONS

摘要

The invention provides a gasoline composition comprising a major amount of a gasoline suitable for use in a sparkignition engine, 1 to 15% v of ethyl levulinate, and 20 to 2000 ppmw of a nitrogen-containing detergent containin g a hydrocarbyl group having a number average molecular weight in the range 75 0 to 6000; the preparation of such a composition, and its Use in operation of a spark-ignition engine.