in the 5.0 give more hp? Yes, a little. Did some testing with the Dragy. Running 93 instead of 87 gave me 0.2 - 0.3 seconds better 0 - 60. Tried to keep it apples to apples running the same place, time of day, launch, etc.

Truck is '19 F150 XL std cab, 8' bed, 5.0, 4x4, 3.55, 10 sp with around 21k. Best 0 - 60 was 6.23

 

I get a bit better MPG's, not sure if it's enough to justify spending extra $0.30 per gallon though.

 

My wife's Ecoboost get better mileage and performance with premium, but her 2.0 Ecoboost does not get the mileage of my 5.0 S550 Mustang on 93. I don't notice any difference in mileage on my 5.0 F150.

 

Too many variables for me to determine if I am getting better mileage or not. Without the Dragy the difference in performance would not be noticeable.

 

Yes, running 93 in the 18+ 5.0 or ANY year 3.5 ecoboost or 2.7 ecoboost picks up horsepower over running 87. The ecu allows more timing.

 

What did you check your 0-60 with and HP with?

 

Try some 100 octane and report back to us.

 

Same here, but it's closer to $.80 difference between Regular and High test, around here. With Regular I can get about 500-520 miles out of a tank. With the 93, I'll get about 550 miles. Not worth it at all!

 

It's in the post you quoted, he used dragy, which is very accurate on verified runs.

The owner's manual doesn't lie, for optimal vehicle and engine performance, an octane of 91 or higher is needed. Depending on where you live probably E85 is the choice for the 5.0 from what I gather and 91-93 for the EcoBoosts.

You won't make up the price difference on the slight increase in fuel mileage, and should run acceptably on 87. Also as the manual says, the hotter is it and the harder you work the engine, the bigger the difference of higher octane.

 

I've never heard of this product and was skeptical until I saw the "tree" lights! I've seen guys use a stopwatch which for accuracy is only approximate until they get to the track and use the 'tree" and become disillusioned about their true times..

I use a top-tier fuel like the manual 'suggests' and mix 87 and 93 at the pump to get ~ 91 octane 36 gal. tank (~ a 45-55% mix is close). I'm a 100% believer in what the owner's manual tells me..