So... after reading this post from biz4two about octane, what octane are you guys using? I've run nothing but 87 in mine since day one. I have noisy injectors but figured it was just a characteristic of the DI engine.

 

I've been using mid-grade (89 Octane) in my '17 3.5 EB since day one. Hot, cold, towing, not towing. Seems to work just fine. My one unscientific test took place when I had to tow a 3700 pound car on a two axle transporter. It was 250 miles each way in 80 degree weather mostly on Interstate. I ran mid-grade going one way and premium going the other way. I saw no difference in fuel mileage or performance. Like I said - unscientific. Maybe if I had been up near the towing limit and in hotter weather there would have been a difference. Oh, and pulling that trailer I was getting 11 mpg.

 

5.0 and the manual says 87 which is what I put in.

 

 

I use 87 octane most of the time, except when towing I will put in 91 octane. I've not had any issues whatsoever.

 

I thought all the stock Ford gasoline engines that come in the F150 could run on 87. Is yours a special edition/supercharged/etc?

I tend to run mid-grade...but sometimes I do premium or 87.

 

91 or whatever the "Premium" is. 2017 2.7.

 

Manual states min 87.

 

With the gas prices low as they are at the moment, I've been running premium for the last several months.

 

My bad, I put in 87 but typed 89 for some dopey reason, I'll edit to correct.

 

Manual said 87 so I used 87. For the vast majority of engines, putting in 89 won't make a difference.

 

I have run 93 and 87 in mine, and I haven't really noticed any difference. If I end up getting a tune, it will definitely be a 93 octane tune.

 

thanks for the replies

 

 

I use 93 Octane Because I have a Tune and it runs allot better