5.0's also. I think it even gives the HP increase in the manual. That's legit, but to most of us we don't need it, and it plays true to Tigeos comment about it. It runs fine on 87. But many run 93 and never use more than 150 of their available HP. Like me. I WOT only to pass people, and half the time I don't even WOT. Probably more like 75% of the time I don't WOT to pass.You think you telling a funny, but it’s been proven on the dyno that even though the 3.5EB will run just fine on 87 octane, that filling the tank up with 93 long enough for the octane sensor to register, will result in an additional 20+ RWHP.
Ford knows the added octane is optimal, but also knows most truck owners are looking for low cost. That’s why I got an E30 tune and run it frequently- not only does HP jump from the ~320rwhp level to just over 500, but the last time I filled up with E85 at Casey’s I paid $1.64/gal when 87 was $2.67. The ~12-15% mileage loss is a small price to pay for those tradeoffs IMO.
I get on Ford a little bit because I had a bad 5.0. 2018 model. First time I took it into the shop for the intermittent cam phaser knock they swore it was ping. "Run premium and that will go away" , except it didn't. I also was able to run a few successive tanks of E85 (even higher octane than premium) with no change. Took it back to the shop "maybe you got bad premium, try some more" - took them 20,000 miles to agree with me that I had a lemon truck.
Not to hijack, but a straight E30 tune and a tank of E30 gains you THAT much HP or are there other mods? That's pretty darn nice. I'd run HPL too if I did that lol.