An apparatus for lipophilically conditioning potato slices, the apparatus with an elongate tank for containing a reservoir of oil, the tank having an upstream end and a downstream end, an elongate longitudinal conveyor disposed in the tank, the conveyor being adapted to pass products through the reservoir of oil from the upstream end to the downstream end, the conveyor defining therealong a plurality of compartments for containing respective groups of products during passage from the upstream end to the downstream end, and at least one oil jet located on the tank for causing turbulent flow in the reservoir of oil.