ethanol E10 E15 - Jeep Wrangler Forum
Jeep Wrangler Forum

Go Back   Jeep Wrangler Forum > JK Jeep Wrangler Forum > JK Tech Forum

Join Wrangler Forum Today


Like Tree5Likes
  • 1 Post By Jay2011JK
  • 1 Post By gobi_rubi
  • 2 Post By cdeslandes
  • 1 Post By rgreen65
Reply
 
Thread Tools

Please support our sponsors and let them know you heard about them on WranglerForum.com
Old 11-22-2019, 03:51 PM
Thread Starter
  #1
Jeeper
 
Join Date: Nov 2016
Posts: 33
ethanol E10 E15

does anyone use e15 in their wrangler and if so what is the mileage hit and is there a big hit on mileage with e10. E15 is 5c cheaper than e10 where I live is it worth burning e10 e15 or should I stick with regular gas no ethanol 87 octane for about 34 cents more per gallon. THANK YOU Mike

jeeper9187 is offline   Quote
Old 11-22-2019, 03:55 PM   #2
Supporting Member

5-Year WF Supporting Member
 
cdeslandes's Avatar
 
Join Date: Apr 2014
Location: CT & VT
Posts: 3,170
What does your manual say about it?

Most model years of the JK, like many cars on the market, are supposed to use 10% ethanol max. A higher percentage may void the warranty.

__________________
2014 JK Unlimited Rubicon, Copperhead Pearl, minivan engine, 6 speed, Rock Krawler X-Factor 2.5" lift, Falcon shocks, 35" Dick Cepek M/T
My build: Copper Rubi build

Other rides: 2010 BMW Z4 35i, 2016 Volvo XC90
cdeslandes is offline   Quote
Old 11-22-2019, 04:02 PM
Thread Starter
  #3
Jeeper
 
Join Date: Nov 2016
Posts: 33
it says 87 octane 0-15% ethanol which doesn't tell me much
jeeper9187 is offline   Quote
Sponsored Links
Advertisement
 
Old 11-22-2019, 04:25 PM   #4
Supporting Member

5-Year WF Supporting Member
 
cdeslandes's Avatar
 
Join Date: Apr 2014
Location: CT & VT
Posts: 3,170
Quote:
Originally Posted by jeeper9187 View Post
it says 87 octane 0-15% ethanol which doesn't tell me much
Then you can use E10 or E15. Regular gasoline.

I have a 2014, it's 10% ethanol max (i.e. E10) so they must have changed the requirement in '15 or '16.
__________________
2014 JK Unlimited Rubicon, Copperhead Pearl, minivan engine, 6 speed, Rock Krawler X-Factor 2.5" lift, Falcon shocks, 35" Dick Cepek M/T
My build: Copper Rubi build

Other rides: 2010 BMW Z4 35i, 2016 Volvo XC90
cdeslandes is offline   Quote
Old 11-22-2019, 05:07 PM   #5
Jeeper
 
Lemotan's Avatar
 
Join Date: Mar 2019
Location: California
Posts: 672
Ethanol alone burns cooler BUT gas/ethanol mix (E10-E15) burns hotter than normal gasoline while it might be benefic for emissios its probably not good for integrated exchaust manifolds and overall engine temp.
IMO No ehtanol regular is probably the best for pentastar.
Lemotan is offline   Quote
Old 11-22-2019, 05:13 PM   #6
Jeeper
 
Join Date: Feb 2012
Location: S.E. Pa
Posts: 466
Check the book (owners manual) "Only vehicles with the E-85 fuel filler door label or a yellow gas cap can operate on E-85."
(If i have to explain it ..you wouldn't understand)
NLeischen likes this.
__________________
Vaya Con Dios..2 JKU's both mbrs of Real Men Use 3 Pedals" Club..
Jay2011JK is offline   Quote
Old 11-22-2019, 05:52 PM   #7
Jeeper
 
gobi_rubi's Avatar
 
Join Date: Nov 2018
Posts: 242
Quote:
Originally Posted by Jay2011JK View Post
Check the book (owners manual) "Only vehicles with the E-85 fuel filler door label or a yellow gas cap can operate on E-85."
(If i have to explain it ..you wouldn't understand)
E85 is not E15
jadmt likes this.
gobi_rubi is offline   Quote
Old 11-22-2019, 06:46 PM   #8
Supporting Member

5-Year WF Supporting Member
 
cdeslandes's Avatar
 
Join Date: Apr 2014
Location: CT & VT
Posts: 3,170
Quote:
Originally Posted by gobi_rubi View Post
E85 is not E15
E10 = 10% ethanol / 90% gasoline

E15 = 15% ethanol / 85% gasoline

E85 = 85% ethanol / 15% gasoline (AKA "flex fuel")


10% ethanol is what's needed for catalytic converters to work their best. Anything higher is a subsidy to industrial-scale corn farming and companies like Monsanto, Cargill, etc.
Jay2011JK and WillB like this.
__________________
2014 JK Unlimited Rubicon, Copperhead Pearl, minivan engine, 6 speed, Rock Krawler X-Factor 2.5" lift, Falcon shocks, 35" Dick Cepek M/T
My build: Copper Rubi build

Other rides: 2010 BMW Z4 35i, 2016 Volvo XC90
cdeslandes is offline   Quote
Old 11-22-2019, 07:46 PM   #9
Jeeper
 
Join Date: Feb 2012
Location: S.E. Pa
Posts: 466
Quote:
Originally Posted by cdeslandes View Post
E10 = 10% ethanol / 90% gasoline

E15 = 15% ethanol / 85% gasoline

E85 = 85% ethanol / 15% gasoline (AKA "flex fuel")


10% ethanol is what's needed for catalytic converters to work their best. Anything higher is a subsidy to industrial-scale corn farming and companies like Monsanto, Cargill, etc.

Your Clarification very much needed.. WTG !
__________________
Vaya Con Dios..2 JKU's both mbrs of Real Men Use 3 Pedals" Club..
Jay2011JK is offline   Quote
Old 11-22-2019, 08:47 PM   #10
Jeeper
 
ibikee's Avatar
 
Join Date: Sep 2015
Location: South of Nashville Tn
Posts: 773
My 2015 jk manual says max of 10% ethanol. When I drove my e85 Silverado up through Illinois I tried the e85. Mileage went from 19mpg to 13mpg. It also ran like poo when I got back to Tennessee and ran e10. After starting, the motor would feel like it completely shut down and then come back to normal rpm. Really strange. After many fill ups it finally cleared up and ran right.
I didn’t think any Jeep Wrangler models could run more than 10%?
__________________
2015 2dr Sport. Rubicon springs and shocks take offs for 1 1/2 inch lift. Auto. Regeared Yukon 4:11, 33" duratracs
2004 Rubicon. OME 2.5” lift. 1” body lift. 33” MTs.
ibikee is offline   Quote
Old 11-22-2019, 09:16 PM
Thread Starter
  #11
Jeeper
 
Join Date: Nov 2016
Posts: 33
in my 2016 manual it says u can use e15 but I only did once and it seemed to run fine
jeeper9187 is offline   Quote
Old 11-22-2019, 09:41 PM   #12
Jeeper
 
rgreen65's Avatar
 
Join Date: Aug 2014
Location: S. Georgia
Posts: 6,021
As ibikee found out the higher the percentage of ethanol, the worse the fuel mileage. Not only that but it costs more to produce and raises the cost of corn. But there is a big government subsidy that lower the cost of the fuel.
Lusus_Naturae likes this.
__________________
2003 Light Khaki TJ Rubicon, Manual, Soft Top
2015 Anvil JKU Sahara, Auto, Hard Top - Traded
2017 Chief JKU Chief, Auto, Hard Top
rgreen65 is offline   Quote
Old 11-22-2019, 09:44 PM   #13
Moderator

WF Lifetime Member
WF Supporting Member
::WF Moderator::
 
jadmt's Avatar
 
Join Date: Sep 2012
Location: missoula
Posts: 20,734
Quote:
Originally Posted by jeeper9187 View Post
in my 2016 manual it says u can use e15 but I only did once and it seemed to run fine
If it ran fine and your manual says it’s ok and the mpg is good enough to make it worthwhile keep running it and give us a detailed report every 10,000 miles or so.
__________________
2018 Gobi Recon unlimited W/Mopar 2" lift coils combined with RK rear coils wedges, TF lower control arms, rear TF monster track bar and rear track bar bracket and Falcon 3.1 shocks, Cooper ST Maxx 315/75-17 on AEV Salta rims, Grabars, RE gas skid tank, mopar head liner, Warn VR10 and Maximus3 winch plate.
https://www.wranglerforum.com/f314/y...i-2192385.html
jadmt is offline   Quote
Old 11-24-2019, 10:50 AM
Thread Starter
  #14
Jeeper
 
Join Date: Nov 2016
Posts: 33
I don't want my fuel pump to go out I heard ethanol is bad on the fuel pump my uncles suburbans fuel pump went out I think he was using e85 though
jeeper9187 is offline   Quote
Old 11-26-2019, 01:11 PM   #15
Jeeper
 
cranbiz's Avatar
 
Join Date: Oct 2017
Location: Reidsville, NC
Posts: 2,628
My 12 is designed for 10% ethanol, that's what I run if I'm not using 89 pure gas (which I use once in a while when I can find it). I never have tried E15 and when I asked Jeep about it, they said not to do it. My wife's 2017 Grand Cherokee can run E15. When I run E15, surprisingly, it appears to run better and it also does get a mpg or 2 better on E15. I know that really doesn't make sense from a chemical point, but it does.
__________________
KN4BBA

06 KJ
12 JK,2.5" Teraflex lift, 3/4 spacers ,Bilstein 5100's,BFG KM3's 37x12.5/R17 with beadlocks.
17 WK2 Trailhawk
cranbiz is offline   Quote
Old 11-26-2019, 02:04 PM   #16
Moderator

5-Year WF Supporting Member
::WF Moderator::
 
Join Date: Mar 2016
Location: Clear Spring, Md
Posts: 3,810
Around here it is almost impossible, and not particularly feasible, to get gasoline without ethanol in it. Pretty much everywhere you go it is 10% ethanol. But we don't have a lot of E85.
We have been running E10 in this area for over 20 years as I recall. I have run it in an assortment of vehicles, ranging from dirtbikes to Moto Guzzi's to sport compact cars to our JKU. In all those years I have had no issues relating to the fuel system in any of those motor vehicles. I am not judging the principal of ethanol in gasoline, just saying that if someone has a fuel pump fail it isn't likely the ethanols fault unless he was using fuel beyond what the vehicle was designed to use. Or it could be a case of bad gas, but that also isn't the ethanol.
That said, I have seen modern gasoline turn the rubber tubing some poor manufacturers used for fuel line into taffy. But that isn't the fuels fault, that is someone using rubber tubing where they should be using actual fuel line.
GuzziMoto is online now   Quote
Old 11-26-2019, 02:56 PM   #17
Jeeper
 
Join Date: Feb 2017
Posts: 54
Check here guzzimoto, this has a updated list of all states with locations for ethanol free. Maybe some places are close to you. I hate that scam gas with a passion!

https://www.pure-gas.org/index.jsp?stateprov=MD
rubicon1785 is offline   Quote
Old 11-26-2019, 03:30 PM   #18
Moderator

5-Year WF Supporting Member
::WF Moderator::
 
Join Date: Mar 2016
Location: Clear Spring, Md
Posts: 3,810
Quote:
Originally Posted by rubicon1785 View Post
Check here guzzimoto, this has a updated list of all states with locations for ethanol free. Maybe some places are close to you. I hate that scam gas with a passion!

https://www.pure-gas.org/index.jsp?stateprov=MD
I have seen those lists. There isn't much available around me, and what there is usually is at a premium price.
For something that uses a few gallons maybe it would be worth the effort and expense. But for something like the Jeep that uses 20 gallons every 300 miles or so it just isn't worth it. Especially since I have been running ethanol gasoline for over 20 years now and not had any issues. It has long ago become normal around here.

By the way, I accidentally clicked "Edit" instead of "Quote" on your post and that is why your post shows as last edited by me. Sorry, I am pretty sure I didn't change your post. Just not yet used to things. My bad.
GuzziMoto is online now   Quote
Old 11-26-2019, 07:04 PM   #19
Jeeper
 
Wildtoad's Avatar
 
Join Date: Sep 2018
Location: Blythewood, SC
Posts: 157
All I know is that the manual for my 2015 JK Sahara 2DR states E10 as the max and any higher may cause issues and void warranty. That’s good enough for me. Around here, pure gas is not cost effective.
__________________
Tom Wilds

2015 Jeep Wrangler Sahara 2DR Hardtop
Wildtoad is offline   Quote
Old 11-26-2019, 09:21 PM   #20
Jeeper
 
Nemo Consequentae's Avatar
 
Join Date: Sep 2018
Location: Oz
Posts: 290
I've been using E10 long term in my '08 with the 3.8 in it. No issues.



As for mileage, when I first got it, (2nd hand). I spent several months running each grade of fuel we had available & comparing the fuel economy. Nett result 98RON gives best range, but not worth the extra cost. 91/95/E10 (~94RON), all effectively the same mpg, with the minivan engine. (No measurable significant difference using records of fuel fills & km traveled. Not using dash readout.) E10 wins for dollars per km.

__________________
Jeeps: Lego for grownups!
Nemo Consequentae is offline   Quote
Reply

Tags
ethanol , fuel , gas

Thread Tools

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off






All times are GMT -5. The time now is 10:51 AM.


Powered by vBulletin® Version 3.8.8
Copyright ©2000 - 2019, vBulletin Solutions, Inc.
Search Engine Optimization by vBSEO 3.6.1
User Alert System provided by Advanced User Tagging v3.1.0 (Pro) - vBulletin Mods & Addons Copyright © 2019 DragonByte Technologies Ltd.
vBulletin Security provided by vBSecurity v2.2.2 (Pro) - vBulletin Mods & Addons Copyright © 2019 DragonByte Technologies Ltd.

Jeep®, Wrangler, Liberty, Wagoneer, Cherokee, Gladiator, Mopar and Grand Cherokee are copyrighted and trademarked to FCA US LLC.
Wranglerforum.com is not in any way associated with FCA US LLC.