Consider the first-order advanced differential equation of the formwhere q i , 1 ≤ i ≤ m are functions of non-negative real numbers, and σ i , 1 ≤ i ≤ m are functions of positive real numbers such that σ i (t) > t for t ≥ t 0 . New oscillation criteria, involving lim sup and lim inf, are established, in the case of non-monotone advanced arguments. An example illustrating the results is also given.