Middle Eastern carrier Etihad Airways is to equip some of its Airbus A320s on order with the new 'sharklet' wing-tip being developed by the airframer.
Etihad will have the sharklets fitted to 17 of its A320s.
Delivery of the modified aircraft will start in the third quarter of next year.
Etihad has 43 Airbuses still to be delivered from previous orders, including 10 A380s, adding to a fleet which already comprises 50 Airbus passenger jets and two A330 freighters.
"In today's climate, our airline is fully focused on maximising the environmental efficiency of the entire fleet," says Etihad chief James Hogan.
Sharklets will be an option on new-build A320s from the end of this year.