If i had a Ecoboost V6 i'd prooooobably run 0W-40 or 5W-40 , there's a guy on here who has been using M1 0W-40 in his 3.5 Ecoboost i think and his engine runs great on it, i think he also did a UOA on it and found it to be doing great.
The Ecoboost is tough on its oil so i'd be running a A3/B4 0W-40 / 5W-40 just to be on the safe side of things and change the oil at the recomended intervals.
The Ecoboost is tough on its oil so i'd be running a A3/B4 0W-40 / 5W-40 just to be on the safe side of things and change the oil at the recomended intervals.