International Seaways expects to reduce fuel consumption by 5% by retrofitting four ageing MR tankers.

Finnish technology group Wartsila said the US shipowner will install propulsion solutions on the 47,800-dwt Seaways Galle, Seaways Gatun, Seaways Hercules and Seaways Huron (all built 2007).

Wartsila will supply EnergoFlow and EnergoProFin kits to upgrade the vessels’ controllable pitch propeller systems.