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Ecoboost Octane and Fuel Selection

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Old 03-14-2014, 01:00 AM
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Originally Posted by Ecofx86
maybe you sound be driving something with better gas mileage like a Honda civic or corolla. I can't comprehend how .50 cents is going to break the bank. Btw I dd a civic can't beat 33mpg back n forth to work!
That would be $18 more per fill up assuming a 36 gallon tank...
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Old 03-14-2014, 01:07 AM
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I dunno.... unquestionably an F-150 will work just fine on regular (i.e. 87 octane) gas. But it also unquestionably works better on 91 octane and Ford freely admits it. At 17K miles I'm at at the stage where I won't drive across town on the diagonal to get no ethanol gas, but I still get high octane. Seems prudent for a new car during break-in at least.
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Old 03-14-2014, 05:11 AM
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So premium fuel doesn't have ethanol? In Utah (high altitude) the cheap crap is 85 octane, while premium is only 91... I need to fill up for the first time (I have 500 miles on the old girl ) and am probably going to stick with premium for the life of my Truck.

Thanks for the good info OP!
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Old 03-14-2014, 06:26 AM
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Originally Posted by BIG Laing
So premium fuel doesn't have ethanol? In Utah (high altitude) the cheap crap is 85 octane, while premium is only 91... I need to fill up for the first time (I have 500 miles on the old girl ) and am probably going to stick with premium for the life of my Truck. Thanks for the good info OP!
My premium 91oct does. 10%. They just recently changed it all around here.
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Old 03-14-2014, 06:37 AM
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Originally Posted by 2013FX4RD
My premium 91oct does. 10%. They just recently changed it all around here.
My opinion is if they are adding 10% to premium then it's no longer premium. If we have to pay more for it, I want pure gas.
Btw, premium in Ontario is still ethanol free...so far.
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Old 03-14-2014, 06:41 AM
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Originally Posted by MadocHandyman
My opinion is if they are adding 10% to premium then it's no longer premium. If we have to pay more for it, I want pure gas. Btw, premium in Ontario is still ethanol free...so far.
I agree with you. I'm going look around today and see if a station even carries pure gas anymore.
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Old 03-14-2014, 08:24 AM
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Originally Posted by JasonNez
^ Just curious where you live. $.50 between 89 and 91 is a lot. Here in upstate N.Y. the difference between 87 and 93 is around $.30.
In Vermont, I have seen as much as .60 difference between 87 and 91/93.
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Old 03-14-2014, 08:29 AM
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Originally Posted by SkiSmuggs
In Vermont, I have seen as much as .60 difference between 87 and 91/93.
Here in KY its only .10 cent between grades fo E10.No pure gas within 100 miles unfortunately.
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Old 03-14-2014, 08:37 AM
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Originally Posted by kyrenegade
Here in KY its only .10 cent between grades fo E10.No pure gas within 100 miles unfortunately.
While the price of 87 octane goes up and down, the price of 91/93 seems locked at $3.99 and at $4.09 at some stations. The only way I can get a break is with the .10 discount at Cumberland Farms (Gulf) using Smart Pay or .06 at Exxon/Mobile if I get at least 45 gallons/month with their card.
But after reading the OP, I topped of my tank with 91, and will just consider it insurance. I run premium during towing season anyway.
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Old 03-14-2014, 08:55 AM
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If I have to pay 50 cents a gallon extra for premium fuel to "protect" my ecoboost then that puts me on par with the price of diesel. Now a diesel in my 1/2 ton sounds even better. Now all I have to do is hope that the added fuel economy from the diesel will pay for the price difference between the two engines and that Ford will get on the stick and offer one.
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