Does the 2.7L Ecoboost require premium gas?

Laminar

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This used to not be the case even 10 years ago. Knock detection and prevention systems were much more rudimentary and designed primarily to prevent catastrophic failure. In engines like those using a fuel type with octane ratings higher than recommended by a manufacturer was pointless because the engine simply could not utilize the extra detonation resistance.
So many people repeating the same BS they heard from their "car expert" uncle Cooter who drives an '87 Camaro and has no clue how modern stuff works.

As far as premium fuel being cleaner than regular. That's horseshit.
(y)(y)(y)





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wjfawb0

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What Laminar and Internally_Combusted said. Higher octane gas like 91/93 and especially E85 resist detonation by having higher flash points. You can run higher pressure and temperatures without preignition. Turbo cars can also use the wastegate to regulate boost levels along with the dynamic compression of the engine using the variable valve timing adjustments. Spark and fuel timing can be retarded and advance too, on an individual cylinder basis.

It's not uncommon for stations in my area to offer 100% gasoline 0% ethanol fuel. I've used it in many of my cars (5.4 F150, 5.0 Mustang, 3.6 Wrangler) and almost always get about 10% better mpg highway. That's not really a surprise because ethanol doesn't contain the same amount of energy as gasoline per volume. E85 compatible vehicles have to have injectors large enough to supply enough of the fuel to hit stoich air fuel ratio. Gasoline is around 14.7:1 air:fuel for stoich. E10 is 14:1. E85 is 9.85:1.

https://www.ecmtuning.com/wiki/e85fuel
 

rtaylor

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Title.

Since this motor is turbo'd, should I be running this 🐎 on premium fuel?
If you want to get the advertised power out of the engine, then 93 is required. But the Ford engine computer will learn whatever you are using 87-93 and will operate fine at reduced power. In many areas 93 is not available (only 91 or 92). It is entirely your choice.

If you purchase an after-market tune, they are usually for a specific octane that you specify (the factory octane-learning is disabled), but you are rewarded with higher power. With aftermarket tune, you should never use lower octane fuel than specified by the tune.
 

Longshot

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More interested in the cold air intake to boost it... On a side note, glad mine doesn't have the start/stop. I would bypass that as soon as I got home!
Me as well! I held off on the mods on my F-150, but some decent gains can be made on the 2.7... Will definitely be making some on the Bronco!
 

wvmtneer

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I usually run 87 in my 3.5 ecoboost, but filled up with 89 my past few tanks. Believe it or not, I can definitely feel that the engine drives better, lugs less, etc. i don’t think i’ll go back to 87.
 

TOWMA8R

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With adaptive tuning and a turbo, it gets full EPA HP Performance in the highest Octane. If it has a turbo, it will have premium gas in my tank.... IMO
 

mdonathan56

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If the horse power and torque ratings do not include the caveat "With 91+ octane" you should be good on 89.
 

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