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E85 Experiment #5245201 10/20/19 04:11 PM
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kstanf150 Offline OP
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Fill up my tank today with E85 for the first time ever.
I’ll post later in the week with results of mpg change 👍

Re: E85 Experiment [Re: kstanf150] #5245243 10/20/19 05:05 PM
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skyactiv Offline
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How empty was your tank when you got E85? If you filled up at a 1/4 of a tank as an example, you cant give us real world results.

Supposedly, E85 gets anywhere from 15-27% less MPG's than E10.


Wife: 15' Audi A4 quattro 6 speed manual
Sold: 13' VW GTI 3 door 6 speed manual
Me: 18' Elantra Sport 6 speed manual


Re: E85 Experiment [Re: skyactiv] #5245247 10/20/19 05:10 PM
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Originally Posted by skyactiv
How empty was your tank when you got E85? If you filled up at a 1/4 of a tank as an example, you cant give us real world results.

Supposedly, E85 gets anywhere from 15-27% less MPG's than E10.


Well you just have to do the math. Ethanol has 76,100 btu's per gallon vs gasoline at about 114,000 and E85 is at 81,800.

http://www.hho4free.com/gasoline_vs_ethanol.html

Thing is, I believe E85 isn't always 85% ethanol, it could be a higher mix of gasoline so depending on the price, it might be a good deal and give you better mpg than expected due to higher gasoline concentration.

Re: E85 Experiment [Re: skyactiv] #5245320 10/20/19 06:23 PM
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kstanf150 Offline OP
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Originally Posted by skyactiv
How empty was your tank when you got E85? If you filled up at a 1/4 of a tank as an example, you cant give us real world results.

Supposedly, E85 gets anywhere from 15-27% less MPG's than E10.


I was under 25 to empty
So I was really low on fuel

36 gallon tank, I got almost 33 gallons of E85

Last edited by kstanf150; 10/20/19 06:26 PM.
Re: E85 Experiment [Re: kstanf150] #5245396 10/20/19 07:49 PM
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danez_yoda Offline
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What vehicle? Hopefully its rated for E85.

Re: E85 Experiment [Re: kstanf150] #5245425 10/20/19 08:19 PM
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Rmay635703 Offline
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BTUs alone don’t determine fuel economy

Modern high compression engines will run better timing and power on e85

Due to the vapor pressure inflection point e20-e30 will deliver (better than expected) fuel economy in any obdii engine

Re: E85 Experiment [Re: kstanf150] #5245445 10/20/19 08:39 PM
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Rand Offline
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E85 is usually somewhere between 51-83% ethanol. in the winter more "gas" is used.


2019 Jeep Cherokee Trailhawk 2.0T
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Re: E85 Experiment [Re: Rmay635703] #5245618 10/21/19 05:41 AM
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Linctex Offline
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Originally Posted by Rmay635703

Due to the vapor pressure inflection point e20-e30 will deliver (better than expected) fuel economy in any obd-2 engine


Please explain this concept.


"The evidence demands a verdict".
(Re:VOA)"it's nearly impossible to actually know the particular additives that are in there at what concentrations."
Re: E85 Experiment [Re: Rand] #5245734 10/21/19 08:09 AM
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DriveHard Offline
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Originally Posted by Rand
E85 is usually somewhere between 51-83% ethanol. in the winter more "gas" is used.


not in Iowa...I believe we have a state mandated minimum of 70% year round.


Smile, it increases your face value
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Re: E85 Experiment [Re: danez_yoda] #5246540 10/21/19 09:07 PM
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kstanf150 Offline OP
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Originally Posted by danez_yoda
What vehicle? Hopefully its rated for E85.


2018 Ford F-250
6.2L
It’s good for E85

Re: E85 Experiment [Re: DriveHard] #5246543 10/21/19 09:08 PM
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kstanf150 Offline OP
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Originally Posted by DriveHard
Originally Posted by Rand
E85 is usually somewhere between 51-83% ethanol. in the winter more "gas" is used.


not in Iowa...I believe we have a state mandated minimum of 70% year round.


Sticker on the pump stated minimum 70%

Re: E85 Experiment [Re: kstanf150] #5246942 10/22/19 10:19 AM
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kstanf150 Offline OP
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Two hundred miles into this tank
Mix of city highway which is my normal
Mpg down from 14.5 to 14.4 so far
Need to run a couple tanks to get a better number

Re: E85 Experiment [Re: kstanf150] #5247391 10/22/19 05:37 PM
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pezzy669 Offline
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That actually is barely a drop in MPG for E85.

I ran E85 almost exclusively in my old '09 MB C300 and the fuel economy hit was pretty significant in both freeway and city. Was rated 18/25 on 93 octane or 13/19 on E85, purely freeway trips would drop from 26-27 down to 20-21 and purely city commuting would drop from 15-16 down to 9-10. I kid you not some pretty horrific city mixed in I was seeing low 9 MPG, fuel light would come on with about 2 gallons left in the 17ish gallon tank. I was at the pump filling up A LOT when it was strictly city driving. LOL

The cost spread between 93 and E85 made it still financially beneficial for me to run E85 the majority of the time. There were a handful of tanks where the spread made 93 a better proposition so it had a few tanks of 93 thrown in here and there.


2012 Volkswagen Jetta Sportwagen TDI - 69k - Castrol Edge Professional LL03 5W30
2011 Volkswagen Jetta Sportwagen TDI - 49k - Castrol Edge Professional LL03 5W30
Re: E85 Experiment [Re: kstanf150] #5247505 10/22/19 07:08 PM
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kstanf150 Offline OP
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Yeah
So far I’m not seeing a big difference in mpg

But from a performance side

Butt dyno tells me it’s a little stronger with E85

Re: E85 Experiment [Re: danez_yoda] #5247513 10/22/19 07:17 PM
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Rat407 Offline
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Originally Posted by danez_yoda
What vehicle? Hopefully its rated for E85.


Why? My 2002 Silverado isn't rated to run E85 and it has been on it for over 3 years now with no issues.


2002 Silverado 5.3 0w-20 AMSOIL
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