Most Efficient .5 Ton While Towing

TurnThePage wrote:
The F150 used 91 octane fuel, making it more expensive yet. My Ram manual recommends 89 octane, so I'm assuming the new one does too, but I'm not certain. I think the GM 6.2 also recommends 91 octane. Is that correct?

If you look up specs on the Ford site they call for 87 octane in the standard Ecoboost, 91 in the Raptor. I think that there is a blurb in manual about better performance with Premium fuel but there is no need for it. I have two 3.5L Ecoboost engines used for heavier pulling than what TFL was doing and neither engine has ever had a drop of Premium. The only issue that I have had is keeping the tires connected while trying to keep up with traffic.