winchested

He said he didn't want to blow his motor. The only instances I have seen or heard of were bad custom tunes that pushed the extreme limits and a guy running high ethanol gas.

He says he doesn't want to blow his motor thats why he wastes money on 93 when the truck is tuned from factory for 87.

So I stated he might as well get into a 91-93 custom tune as there are many custom tuners making safe tunes for those octane ranges.

spence08

It will be cheaper in the long run if your gonna add custom tunes. You can get the x4 or whatever tuner you want from mpt or whoever you choose and custom tunes will come with it. The x4 from mpt is $440 I think and that comes with 3 custom tunes. Or buy the tuner off amazon for 350 or whatever they go for then add custom tunes at $100 a pop. To me that's a no brainer. Tuner off amazon and 1 custom tune= around $450 OR tuner from mpt with 3 custom tunes = $440

13_F150

You are right about what tunes would keep me safe but technically wrong about stock tune.. ALL ecoboost are designed to run premium fuel, nor they can run off regular. There mpg and hp is based off premium fuel. $8 extra a tank for better fuel is a no brainer to me. I will post my decision and my mpg gains in the next week or 2.. thank you.

packplantpath

I've got 15000 miles half with 93 half with 87 octane. There is zero difference in mpg between the two. If you see a difference it is likely because higher octane in your area has less ethanol. Because there is no difference otherwise and there is lots of data online to back it up.

Also the book rated HP is on 87. A Ford engineer has said in an article that HP is higher than rated on 93 octane. I think about 20 HP higher. I run only 93 octane now because it runs smoother and better. But mpg isn't different since it is all e10.

The epa mpg is based on no ethanol gas. Good luck finding it.

In my area 93 octane is ¢60 higher so the cost ends up being about $20 tank.

newsnose

Thanks, Winchester. It was a just a missing period that had me misreading it.

SkiSmuggs

I get my best MPG with Mobil 91/93 fuel and a 91 octane tune. With an 87 octane tune, I didn't see a difference in MPG, but 87 tunes from various vendors had varied results.

13_F150

I run 93 octane cause its a twin turbocharged 365hp motor. 87/93 is avg $.35 more a gallon in my area.. I hope a mild 93 custom tune will put me at 16mpg city

biff420

Just pulled the trigger on the X4 tuner with 5 Tuning and a set of spark plugs from Stage3.

Can't wait!

13_F150

Its very fun.. just added a 5.0 f150 to the family tonight and its not a tuned ecoboost. Dont think I'll be going back to a none turbocharged truck

biff420

Got the tuner today. OMGWTFBBQ!!!!

I haven't gotten the custom tunes from 5 Star yet but I did load the 91 canned tune. Smile can be seen from space.

Time to change out the plugs and play.