A liquid fuel composition is provided containing: (a) a base fuel suitable for use in an internal combustion engine; (b) a first fuel additive selected from one or more viscosity control agents having: (i) a kinematic viscosity at 100° C. of 27 cSt or less; and (ii) a NOACK volatility at 250° C. of 100% wt or less; and (c) a second fuel additive selected from one or more friction modifiers. Fuelling such liquid fuel composition in an internal combustion engine improves the fuel economy performance of an internal combustion engine.
