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Old 08-02-2012, 10:26 AM   #1 (permalink)
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Ethonal blended gas Vs. %100 gasoline

Has anybody noticed a difference in fueling up with E10 or E15 vs. fueling up with %100 gasoline when its available? Just looking for others input and ideas.

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Old 08-02-2012, 10:33 AM   #2 (permalink)
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Yes

http://ecomodder.com/forum/showthrea...l-18896-3.html

Stratus got 36.09 mpg E0($3.45) $0.09559/mile
35.58 mpg with E10 ($3.35 gallon) $0.0941/mile

So E10's cheaper per mile, in 1000 miles it will save me about $1.

Last edited by roosterk0031; 08-02-2012 at 11:59 AM..
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Old 08-02-2012, 11:19 AM   #3 (permalink)
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In my vehicles the difference in price is not worth the small increase in mileage. Maybe if the price difference was less than 20 cents a gallon, but no more that that amount.

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Old 08-02-2012, 12:06 PM   #4 (permalink)
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I personally haven't noticed a drop in mileage from E10 from any of my vehicles. I'm sure its there, but its just not noticable. I know others will chime in with claims that it kills their mileage though. In reality every engine will react differently to a different formulation of gasoline.
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Old 08-02-2012, 12:34 PM   #5 (permalink)
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Thanks for the info guys!
I've heard alot about ethanol E20 and up damaging fuels systems too. Alot of gas stations in Michigan are allowed up to 20% before even posting it! I've had alot of luck with mobil gas, my wife gets around 25-28 city in her taurus 12 valve but using the discounted kroger gas up to $1.00 off she drops down to 19-22 it depresses me.
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Old 08-02-2012, 01:24 PM   #6 (permalink)
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Ethanol affects "older" carbureted-engines far more than "newer" injected-engines, because carburetors are air-mass-ratio devices that can't "adjust" for the presence of ethanol, whereas, computer-control injected engines can/do by adjusting injection volume and ignition timing.
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Old 08-02-2012, 01:50 PM   #7 (permalink)
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I've noticed as much as a 3 MPG difference, but it's usually around 2. As far as cost goes, it's a wash at the moment and ethanol free is hard to come by. The station I use is 20 miles from my house and I have less reasons now to go that direction, so E10 it is unless I'm in that area.
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Old 08-02-2012, 01:53 PM   #8 (permalink)
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Quote:
Originally Posted by Old Tele man View Post
Ethanol affects "older" carbureted-engines far more than "newer" injected-engines, because carburetors are air-mass-ratio devices that can't "adjust" for the presence of ethanol, whereas, computer-control injected engines can/do by adjusting injection volume and ignition timing.
Couldn't you re-jet to adjust the volume? We had more real gas here when my Camaro was still on the road, but it was a little rich anyway on the bottom end. Maybe it will be okay?
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Old 08-02-2012, 03:44 PM   #9 (permalink)
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...probably, but my understanding is that the actual percentage-of-ethanol in the gasoline 'blend' can/does vary with each different tanker truck delievery because the ethanol is "added" into the 'straight-stock' gasoline after its received from the delivery pipeline source, just prior to its delivery to the gas station (to reduce water absorption), so each state/locale has different proportions on an almost daily basis! Notice the labels typically read "...up to XX% alcohol..."

...so, carburetor adjustments made today probably wouldn't be as good or effective when you make your subsequent tank fill-up.
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Old 08-02-2012, 04:04 PM   #10 (permalink)
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Quote:
Originally Posted by Diesel Rules View Post
Thanks for the info guys!
I've heard alot about ethanol E20 and up damaging fuels systems too. Alot of gas stations in Michigan are allowed up to 20% before even posting it! I've had alot of luck with mobil gas, my wife gets around 25-28 city in her taurus 12 valve but using the discounted kroger gas up to $1.00 off she drops down to 19-22 it depresses me.
That discounted Kroger gas comes from the same facility that handles bp, sunoco, and speedway.

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