I'm not an engineer or even have a college degree.... But, have done well with life and I've run regular gas in my 13 F150 Eco since day one..
Towed a #5000 GVWR TT for 5 years on reg and tried premium a couple of times, but never really felt or saw any difference.
Back in Aug 2019, towed the new #7000 GVWR TT and had reg gas in it.. Took the same grades and routes I've taken for years and found the truck getting hotter, having to run one gear lower up the grades and it sucked the gas..
Next trip, I filled up with premium a tank before towing again and went over the same grade and route and with the 92 premium with 10% eth in it did much better.. Back to my normal grade hauling performance with the old trailer.
I have a ODBII phone app and can monitor my boost and temps that the dash gauges does not show and noticed running the 92, I had lower boost and temps for whatever reason..
Been running the 92 since then and I'm seeing about a 1 mpg better overall mileage in my daily commute so dunno??
No proof, just my own butt feelings and I know I'll be ripped on posting this, but what the heck.. It's my butt and my truck! ha, ha!! :)
Mitch
