88 E15

[Stang72]

Anyone running 88 e15 on an 18 or 19 GT?

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[EFI]

Lot of people run it, it's doable with the robust PCM the Mustang has.

Not sure why you would though, you're paying $45k+ for a car to cheapen out on a few bux each fillup and lose a bunch of hp?

 

[Hack]

Lot of people run it, it's doable with the robust PCM the Mustang has.

Not sure why you would though, you're paying $45k+ for a car to cheapen out on a few bux each fillup and lose a bunch of hp?

I know we have this argument all the time here, but you won't notice a power difference unless you are running at timed events. The HP difference is minuscule, not "a bunch".

 

[Zelek]

Yes, another fuel thread!

Just run E85. It's better than everything.

 

[Schwerin]

Not better than 110 octane race gas. Or Jet-A kerosene. Or plutonium. Get a fusion reactor in that bitch, and you can fly your ass to Jupiter on half a tank.

A Mr Fusion? I hear those are all the rage in 2015...

 

[brucelinc]

I have never quite understood why someone would pay the price for a 460 HP performance oriented vehicle and then de-tune it to make less power. To each his own....

 

[EFI]

I have never quite understood why someone would pay the price for a 460 HP performance oriented vehicle and then de-tune it to make less power. To each his own....

Because they can save 4-5 bux per fill-up by buying 87 vs 93. Same people that probably spend more than that each day on coffee.

 

[MX Raptor]

Because they can save 4-5 bux per fill-up by buying 87 vs 93. Same people that probably spend more than that each day on coffee.

Here in Chicago is more like a $1 a gallon difference between 87 and 93 with all the lovely city taxes added in. But really you MAYBE lose 5-10 whp between the two, which your not going to feel on the street daily driving. If you take it to the track you might lose a tenth overall.

 

[EFI]

Here in Chicago is more like a $1 a gallon difference between 87 and 93 with all the lovely city taxes added in. But really you MAYBE lose 5-10 whp between the two, which your not going to feel on the street daily driving. If you take it to the track you might lose a tenth overall.

Ok that's fair, $1/gal difference is ridiculous and I would not really want to pay that either. But why not at least 91 then? It can't be more than 10-20 cents more than 87.

 

[MX Raptor]

Ok that's fair, $1/gal difference is ridiculous and I would not really want to pay that either. But why not at least 91 then? It can't be more than 10-20 cents more than 87.

There's roughly a .50 cent a gallon difference between the grades. $3.30 for 87, $3.80 for 91, $4.30 for 93

 

[Zelek]

There's about a 45-50 cent spread between 87 and 93 here in Austin. E85 coming in at 30 cents lower than 87 octane @ $2.14 a gallon.

 

[DarkestHour]

I've said it before and I'll say it again, if you can't afford gas for your $30-45K car, maybe you need financial guidance help.

 

[nastang87xx]

There's more to it than power, there's also detergents and additives in Premium that I personally think make it worth it. Also remember, strictly more ethanol doesn't mean more detonation resistance, more ethanol just means more ethanol.

Don't be cheap.

 

[Zinc03svt]

I have run E85 for 5k miles and just switched back to stock tune pump 91 for dealer visit. OMG what a difference. The 1500-3500 rpm is totally sackless. Cannot imagine what 87-88 octane runs like...

 

[AlmostFamous]

There's about a 45-50 cent spread between 87 and 93 here in Austin. E85 coming in at 30 cents lower than 87 octane @ $2.14 a gallon.

I believe I’ve seen your car around Austin.

I know we have this argument all the time here, but you won't notice a power difference unless you are running at timed events. The HP difference is minuscule, not "a bunch".

Peak numbers the difference isn’t large but you take a nice hit in the mid-range with 87 octane.

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