PSA Peugeot Citroen is talking to potential customers for an anticipated surplus of engines as BMW and Ford stop using motors jointly developed with the French carmaker, a senior executive said on Thursday. Paris-based Peugeot is contact with at least three possible clients for 1.6-litre gasoline engines manufactured for BMW and larger diesels built for Ford in Tremery, eastern France, powertrain chief Christian Chapelle told Reuters.