FUEL COMPOSITIONS

摘要

This invention provides a fuel composition which comprises a major amount of a fuel boiling in the gasoline boiling range and a minor amount of an additive comprising a furan derivative containing a furyl group bearing one or more substituents comprising one or more heterocyclic and/or one or more aryl groups; an additive concentrate for addition to such fuel and a method of operating an internal combustion engine using such fuel composition. Fuels of the invention give rise to octane requirement increase control and/or octane requirement reduction effects.