Red Bull could be heading towards a swap to Honda power after the Japanese manufacturer impressed with their upgraded power unit at the Canadian Grand Prix.
Red Bull have yet to decide whether they will stick with Renault for next season or switch to Honda engines.
They were keen to see the updates that both engine manufacturers brought to the track in Montreal with Honda upgrade impressing.
“We’re talking about three tenths a lap,” Red Bull’s Helmut Marko told Auto Bild.
Honda, meanwhile, were happy with the update despite a reliability issue for Pierre Gasly on Saturday that forced him to qualify with an old engine