A fuel composition containing, as a major portion, at least one fuel base, and, as a minor portion, at least one oxygenated compound, which contains at least 0.05% by weight of at least one trialkoxyalkane of the formula (I): ##STR1## wherein: X is a divalent hydrocarbon-containing group C.sub.n H.sub.2n, wherein n is 1, 2, or 3, each hydrogen atom optionally being substituted by a hydrocarbon-containing residue;R.sub.1, R'.sub.1, and R".sub.1 are each independently linear or branched alkyl groups containing from 1 to 10 carbon atoms and optionally at least one oxygen atom, two of each of R.sub.1, R'.sub.1 and R".sub.1 groups optionally being connected to form a heterocyclic ring containing 5 or 6 atoms; andR.sub.2 is a hydrogen atom or a linear C.sub.1 -C.sub.4 alkyl radical, or R.sub.2 and hydrocarbon-containing residue X, together by bonding, form a ring containing 5 or 6 carbon atoms.