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  #26  
Old 06-12-2011
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I actually get a little better mileage out of the higher octane so its really not a waste of money. My mileage went way down when the gas stations switched to this ethanol blend, so I was thinking maybe by putting a higher octane in it would run smoother. Was getting a bit of a spark knock, but the higher octane smoothed it out. Could have been some bad gas too though
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  #27  
Old 06-12-2011
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I don't run any ethonal
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  #28  
Old 06-12-2011
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Quote:
Originally Posted by 04RangerDave
I don\'t run any ethonal
I don\'t have a choice, that\'s all we can get around here. All the gas stations get their fuel from the same place and its got ethanol already added. Really sucks cause you have to buy more because of the poor mileage. Can\'t go out of town just to buy gas...

Last edited by Jason8n; 06-12-2011 at 05:00 PM.
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  #29  
Old 06-12-2011
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i don\'t understand why we\'re all typing like this.
Most premium gas is ethanol free, i thought.
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  #30  
Old 06-12-2011
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Hmmm we have an ethanol free gas station here in town. I might have to try em out. Its actually a truck stop but if it works, ill be happy lol
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  #31  
Old 06-13-2011
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Use the lowest octane gasoline that will prevent spark knock. Usually that is 87 octane.


I try to run straight gas, as any kind of ethanol blends make my mileage go down a lot. Ethanol is a completely stupid idea. Less BTU's, less power, less fuel mileage. No upside to it whatsoever.
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  #32  
Old 06-13-2011
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93 it makes mine run alot better without adding octane boosters i can go from my house to mrytle beach and be a little low but not empty
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  #33  
Old 06-15-2011
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Our trucks are not ethanol compatible and will run like a crap. It needs some engine modification or changes to make it compatible. So better to run it on 87 for the optimum mpgs.
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  #34  
Old 06-15-2011
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I run 87, i ran 91 for awhile but i had a tune for it.Unsure on ethonal how do you know if your gas has it?
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  #35  
Old 06-15-2011
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In CT it has to be posted on the pump.
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  #36  
Old 06-15-2011
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I run 87 unless I am tuned for it.

Btw here is a link that will tell you what stations around you run ethanol free gas.


http://pure-gas.org/
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  #37  
Old 06-15-2011
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Quote:
Originally Posted by Flytyer View Post
In CT it has to be posted on the pump.
Same goes for MO. I got a question though, my 3.0 is the flex fuel, does that make it okay to run gas with say 10% ethanol like we have at all the stations around here?

/thread jack
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  #38  
Old 06-15-2011
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Yea its fine
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  #39  
Old 06-15-2011
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Quote:
Originally Posted by Murphy View Post
Ethanol is a completely stupid idea. Less BTU's, less power, less fuel mileage. No upside to it whatsoever.
Kindof.

Ethanol produced from corn is stupid. Ethanol in a gas engine is stupid.

Ethanol is a engine designed specifically for E98 or straight ethanol is flippin amazing. Ethanol can be compressed much more then gas, and there for will combust much more violently, therefore producing much more power. Essentially this power comes for the extra compression, but it is much more powerful.

Quote:
Originally Posted by jaysonbarn View Post
Our trucks are not ethanol compatible and will run like a crap. It needs some engine modification or changes to make it compatible. So better to run it on 87 for the optimum mpgs.
Our trucks are compatible with E10. E10 has been around since the 70's
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  #40  
Old 06-15-2011
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89 e10 is 25c cheaper than 87 e0 here
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  #41  
Old 06-15-2011
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91 here with Fred's mileage tune.
Love it.
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  #42  
Old 06-15-2011
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I run 87 octane in the truck, and Octane on my Sirius radio! I have tried running higher numbers, but any MPG gain was not sufficient enough to make me wanna spent the difference on money. Either way though, I have the 4.0 SOHC engine, it loves fuel, no matter what it is... HATES ethanol
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  #43  
Old 06-16-2011
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Take the 4.0 and the old Ford 302. A mechanic told me that the 4.0 was basically a 302 with the back 2 cylinders chopped off. Why would the gas mileage be worse on the 4.0 than the 302 geared the same?
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  #44  
Old 06-28-2011
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Seeing about a 3 mpg improvement running 93 octane over 87. I did add some Lucas fuel treatment at the last fill up, and mostly driving around town. I would have to say as much as fuel costs, a couple of extra dollars every fill up is worth it, especially with the throttle response.
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  #45  
Old 06-28-2011
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Take the 4.0 and the old Ford 302. A mechanic told me that the 4.0 was basically a 302 with the back 2 cylinders chopped off. Why would the gas mileage be worse on the 4.0 than the 302 geared the same?
That mechanic told you wrong.

Those two engines are completely different designs, nothing the same about them. The 302 is a fractional designed 90 degree V8, the 4.0 is a metric designed 60 degree V6.


That mechanic probably was thinking of the Chevrolet 350cid V8 and the 4.3L V6.
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  #46  
Old 06-28-2011
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The truck is tuned for 87 from the factory. Unless you have a tuner requiring a different octane, your not gaining anything.
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