2013 Ford F150 XLT 3.5 EgoBeast SuperCrew 4X4, 3.55 axles, 9.75" w/elocker
Does not say you must use 93 for towing. Only says you will get better performance while towing with 93.The big question I have is how many of you are just using plain regular 87 unleaded in your trucks? Also, the first thing you do when you buy an ecoboost is get rid of that ridiculous and massively restrictive exhaust system and air intake. Once the truck gets broken in that will improve your mileage too. I'm on my 3rd F-150 ecoboost and unfortunately this one is a lemon. It's been broke since December 12th. But that's besides the fact. I have never used regular unleaded in a turbocharged vehicle. I get 17mpg around town and if I go into Ohio where the roads are flat I get 23mpg on the highway with the cruise set at 65 running on 89 octane. If I'm going to be pulling my trailer I will run 93 octane in it to help keep the turbocharger temperatures down. It even tells you to run high octane in the manual if towing. I ran 87 octane in my current truck just one time to see what happened and I lost 2 mpg. It seems to be happier running a little higher octane.
I agree. No need to use more than 87 ever unless you want better performance. Won't hurt anything.