The investment case for dual-fuel tankers is doubtful because charterers have not been able to offer long-term contracts, according to top executives of DHT Holdings.

A small number of shipowners have placed newbuilding orders for vessels that can run on both LNG and oil-based fuels, which cost 15% more than conventional ships.

But DHT’s co-chief executive Svein Moxnes Harfjeld told an earnings call on Tuesday: “We do not think that dual fuel is the way to go.