Fuel compositions

Liquid fuel composition comprising:

• (a) a base fuel suitable for use in an internal combustion engine;
• and
• (b) a tetraalkylethane compound having the formula (I):
• wherein Ar represents an aryl group and each X is independently selected from a hydrogen atom, substituted or unsubstituted, straight chain or branched C1-C12 alkyl group, (CH2)nOH or (CH2)nNH2, wherein n is in the range of 1 to 9, provided that at least one of the X groups in each CX3 group is a hydrogen atom;
• and
• c) an alkylbenzene compound having the formula (II)
• wherein each R1-R6 group is independently selected from hydrogen and a C1-C6 alkyl group,
• wherein at least one of the R1-R6 groups is a C1-C6 alkyl group,
• wherein the tetraalkylethane compound is present in the liquid fuel composition at a level from 30 ppm to 1 wt %, by weight of the liquid fuel composition, and wherein the alkylbenzene compound is present in the liquid fuel composition at a level from 30 ppm to 2 wt %, by weight of the liquid fuel composition.