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FreePenguin

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I get all my gas from Sam's Club using 93. It's about 20-40 cents cheaper per gallon and I don't DD my stang so I make it work. If I'm a little low I usually throw 10$ of 89 in there never going below 1/3 a tank. Id avoid 87, I feel like it's an "drive normal" or "emergency" fuel at best.
exactly, but where I live, its like 90c difference from 93 at sams/costco to regular stations often enough.

if I didn't have the ability for that cheap fuel, id prob still be using 87 here on out, 3.15 is my 87 in my area. !
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Bikeman315

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f150 and all other ecoboosts have the same recommendation and they get used up and down in vast numbers on 87 that dwarf Mustangs, so those are not blowing up. Let's ask Joe six pack from the 60's how is all this possible.
No one "ever" said using 87 in an EB was going to cause it to blow up. Nothing could be further from the truth. But EB's used in other vehicles are not tuned exactly as they are in a Mustang. I doubt many F150 owners are going WOT all the time. If you're going to drive an EB like a truck 87 is just fine. If you're going to drive it like the performance car it is, better get 91/93.
 

Bikeman315

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exactly, but where I live, its like 90c difference from 93 at sams/costco to regular stations often enough.

if I didn't have the ability for that cheap fuel, id prob still be using 87 here on out, 3.15 is my 87 in my area. !
Wow, that's a lot. My Costco is Regular - $2.619 & Premium - $2.959

$0.34 per gallon x 12 gallons (my average fill) = $4.08. That's less than a coffee at Starbucks.

Why are we even discussing this?
 

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" the V6 gets no benefit from anything higher than 87."


I have read in numerous places that the Ti-VCT valve timing on the V6, which allows for 60* timing adjustment on the intake and 50* on the exhaust and coupled with other features like adaptive knock spark control, allow the ecu to keep advancing the spark until knocking is detected. Meaning higher octane gas most definitely means more "benefit".
 

CorvZ061

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You can run 87 or 93. The car will compensate for it. I've only ever used 93 in my coyote, until recently. No gas station near me has 93 from the fuel shortage a few weeks ago, it's starting to get annoying. I'd like to drive my other car but it has to have 93.
 

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Turbong

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No one "ever" said using 87 in an EB was going to cause it to blow up. Nothing could be further from the truth. But EB's used in other vehicles are not tuned exactly as they are in a Mustang. I doubt many F150 owners are going WOT all the time. If you're going to drive an EB like a truck 87 is just fine. If you're going to drive it like the performance car it is, better get 91/93.
Right so then you finally admit it's okay to use 87 that was the whole point, 99% of people are not driving like maniacs every chance they get and who would be racing on 87, no one. There are engines that recommend or require premium in plain English, there is no reason why Ford would be hiding this or misleading to use 87 if it wasn't okay to do so it's just common sense.
 

FreePenguin

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Right so then you finally admit it's okay to use 87 that was the whole point, 99% of people are not driving like maniacs every chance they get and who would be racing on 87, no one. There are engines that recommend or require premium in plain English, there is no reason why Ford would be hiding this or misleading to use 87 if it wasn't okay to do so it's just common sense.
the ecoboost community is bad about this, they tell newbies "You must run 91/93 or you will blow up" or "stock tune, you need colder plugs or you will blow up" both I disagree with, the tune and plugs should compliment each other, the stock plugs heat and stock tune are perfect together, why people convince people to go put colder plugs on brand new engines, under warranty to prevent something going wrong blows my mind.

id even venture to say if you had an eco boom under colder plugs, ford could deny the warranty for improper plugs? if Cobb can put stage 1/2/3 on ecoboost using stock plugs, the stock tune is perfectly adequate for stock plugs. but nope, people enjoy changing those plugs every 5-10k miles, and paying for pregrapped colder plugs from your favorite tune+ company.

what's worth noting, those are the guys pushing the colder plug thing the hardest.. I mean, smart. tell people you need it, then sell it, tell them you cant gap them yourselves, reduce their longevity meaning need to buy a new set, sell at profit. win.
 

Bikeman315

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Right so then you finally admit it's okay to use 87 that was the whole point, 99% of people are not driving like maniacs every chance they get and who would be racing on 87, no one.
I never denied it. Of course it's OK. But keep in mind this is a Mustang forum so your 99% doesn't hold up all that well. I never went too crazy but used to enjoying airing out my stock EB every now and then.

There are engines that recommend or require premium in plain English, there is no reason why Ford would be hiding this or misleading to use 87 if it wasn't okay to do so it's just common sense.
Ford isn't trying to hide or mislead. They are very clear that to obtain maximum performance you need higher octane fuel. Again for a pickup truck fine, for a Mustang not so much. As always JMHO. :like:
 

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Ford isn't trying to hide or mislead. They are very clear that to obtain maximum performance you need higher octane fuel. Again for a pickup truck fine, for a Mustang not so much. As always JMHO. :like:
[/QUOTE]

I guess the problem is people speak here like it's fact when in reality its just opinions, no one is arguing to achieve maximum performance you use premium, you and other people are arguing 91 is a requirement, it is not EB and 5.0 recommend 87 and if you want maximum performance 91+, I know people would like to think Mustangs are race cars like a Mclaren but they are just budget sport car commuters with occational fun in between, Voodoo REQUIRES 91 in plain English I don't understand whats so difficult lol
1623262435588.png
 
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FreePenguin

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.



Ford isn't trying to hide or mislead. They are very clear that to obtain maximum performance you need higher octane fuel. Again for a pickup truck fine, for a Mustang not so much. As always JMHO. :like:
I guess the problem is people speak here like it's fact when in reality its just opinions, no one is arguing to achieve maximum performance you use premium, you and other people are arguing 91 is a requirement, it is not EB and 5.0 recommend 87 and if you want maximum performance 91+, I know people would like to think Mustangs are race cars like a Mclaren but they are just budget sport car commuters with occational fun in between, Voodoo REQUIRES 91 in plain English I don't understand whats so difficult lol
1623262435588.webp

[/QUOTE]
hes right ya know. ecoboost, it is literally here, just for economy reasons. hence eco'boost. 87 is more economical, its cool they have the ability to let it run 87 or 93, with power being the changing factor. thats a pretty nifty feature imo. I guarantee you 90% of ecoboost owners are running 87, we are a mustang community so you get more purist type people running premium, but yeah. I mostly see grandmas and old people driving ecoboost, and younger guys driving GT"s

its reliable on 87. just the same as 93. just 93 is a bit more fun, and 87 is for utility== both equal safety imo


only thing I also wonder about is the LPFS. sure there are a few on stock tune, that may have had the low fuel pressure sensor cause an issue, but I primarily see tuned cars with failures, and they all blame the fuel sensor. ive also seen people who had no issues, then change the fuel sensor, and then blow.

actually I dont even think ive read of a stock car blowing from low fuel sensor pressure being faulty, but its first to be blamed but when I see people mod list and see the tunes, I kinda put more blame at that then any mechanical issue.
 

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I guess the problem is people speak here like it's fact when in reality its just opinions, no one is arguing to achieve maximum performance you use premium, you and other people are arguing 91 is a requirement, it is not EB and 5.0 recommend 87 and if you want maximum performance 91+, I know people would like to think Mustangs are race cars like a Mclaren but they are just budget sport car commuters with occational fun in between, Voodoo REQUIRES 91 in plain English I don't understand whats so difficult lol
1623262435588.webp
hes right ya know. ecoboost, it is literally here, just for economy reasons. hence eco'boost. 87 is more economical, its cool they have the ability to let it run 87 or 93, with power being the changing factor. thats a pretty nifty feature imo. I guarantee you 90% of ecoboost owners are running 87, we are a mustang community so you get more purist type people running premium, but yeah. I mostly see grandmas and old people driving ecoboost, and younger guys driving GT"s

its reliable on 87. just the same as 93. just 93 is a bit more fun, and 87 is for utility== both equal safety imo


only thing I also wonder about is the LPFS. sure there are a few on stock tune, that may have had the low fuel pressure sensor cause an issue, but I primarily see tuned cars with failures, and they all blame the fuel sensor. ive also seen people who had no issues, then change the fuel sensor, and then blow.

actually I dont even think ive read of a stock car blowing from low fuel sensor pressure being faulty, but its first to be blamed but when I see people mod list and see the tunes, I kinda put more blame at that then any mechanical issue.
[/QUOTE]

Well its not just the ecoboost they also have the same recommendation for the 5.0, were they just too lazy to split up the recommendations lol. Yea with an after market tune from 3rd parties all bets are off the most certain thing is that the tune is the culprit of an engine failure.
 
 








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