Ethanol Free Gas? - E46Fanatics E46 BMW Social Directory E46 FAQ 3-Series Discussion Forums BMW Photo Gallery BMW 3-Series Technical Information E46 Fanatics - The Ultimate BMW Resource BMW Vendors General E46 Forum The Tire Rack's Tire Wheel Forum Forced Induction Forum The Off-Topic The E46 BMW Showroom For Sale, For Trade or Wanting to Buy

Go Back   E46Fanatics > E46 BMW > General E46 Forum

General E46 Forum
This is the place to get answers, opinions and everything you need related to your E46 (sedan, coupe, convertible and wagon) BMW!

Reply
 
Thread Tools Search this Thread Rate Thread Display Modes
Old 12-02-2019, 10:35 PM   #1
Newbimer
Registered User
 
Join Date: Dec 2017
Location: Toronto
Posts: 309
My Ride: 2005 325i
Ethanol Free Gas?

Decided to try the Ethanol free stuff, see if there is a marked improvement in performance, etc. Probably has been discussed before, but for those who are interested, these links may give you some insight on the subject:

https://www.theglobeandmail.com/glob...ticle29103634/

https://www.pure-gas.org/station?station_id=15180
Newbimer is offline   Reply With Quote
Old 12-02-2019, 10:50 PM   #2
wfx32
Registered User
 
Join Date: Dec 2018
Location: VA USA
Posts: 694
My Ride: AWD
Model: 330XI 08/2004
Transmission: auto
Quote:
Originally Posted by Newbimer View Post
Decided to try the Ethanol free stuff, see if there is a marked improvement in performance, etc. ...
https://www.pure-gas.org/station?station_id=15180
i love the puregas app .. really helps to find ethanol free when i am out of my area. ethanol free is much easier to find these days thanks to the boaters and lawn care guys who do not tolerate the ethanol. you can thank them for bringing back the pure gas.

Quote:
Originally Posted by wfx32 View Post
i am not a chemist but i have read about the deterioration of ethanol when stored, its affinity for water and its effect on rubber. those are some of the reasons lawn care companies and boaters avoid the stuff.
i prefer the ethanol free 90 from royal farms to the ethanol free from wawa, but i don't think i notice any better engine performance. as best i understand, the issue with ethanol is that it eats rubber and allows water to condense in the tank. i was advised that if your engine is older than 2000, then you should be using ethanol free gas.
wfx32 is offline   Reply With Quote
Old 12-02-2019, 11:04 PM   #3
wfx32
Registered User
 
Join Date: Dec 2018
Location: VA USA
Posts: 694
My Ride: AWD
Model: 330XI 08/2004
Transmission: auto
Quote:
Originally Posted by Newbimer View Post
Quote:
The only people benefiting from ethanol are farmers and small engine repair shops.
very true. from the same people who brought you corn syrup.
wfx32 is offline   Reply With Quote
Sponsored Links
Advertisement
 
Old 12-03-2019, 12:28 AM   #4
Silverdogz
Registered User
 
Join Date: Jul 2015
Location: Spokane, WA
Posts: 1,045
My Ride: '02 330Ci, '04 330i
Year: 2004
Model: BMW 330i ZHP
Transmission: Manual 6spd
For our cars there is no reason to use ethanol free. These cars were designed to have ethanol in the fuel system, if you owned say and E30 or E36 then it would be recommended to run ethanol free because it would stop damage to valve seats and seals.
__________________
DSC MK60 Replacement and INPA Install:
To view links or images in signatures your post count must be 0 or greater. You currently have 0 posts.


To view links or images in signatures your post count must be 0 or greater. You currently have 0 posts.


To view links or images in signatures your post count must be 0 or greater. You currently have 0 posts.
Silverdogz is online now   Reply With Quote
Old 12-03-2019, 06:56 AM   #5
Brewtus79
Registered User
 
Join Date: Feb 2018
Location: PA
Posts: 92
My Ride: M3 Vert, 330xi
Year: 2002
Model: M3, 330xi
Transmission: 6 spd manuals
I experimented with diff grades of fuel over the summer w my 05 330xi. I didnt notice any appreciable change in performance between any of them, but the fuel economy varied by a couple mpg.

90 oct. nonE = 31-32 mpg
93 oct. = 29-30 mpg
89 oct. = 28-29 mpg

Those are highway figures. For the extra cost associated with the nonE it didnt make sense based on fuel economy to pay an extra 30 cents/gal.

Sent from my SM-G950U using Tapatalk
Brewtus79 is offline   Reply With Quote
Old 12-03-2019, 08:28 AM   #6
VpointVick
Registered User
 
Join Date: Mar 2015
Location: Charlotte
Posts: 1,232
My Ride: '03 325iT Mysticblau
Quote:
Originally Posted by Silverdogz View Post
For our cars there is no reason to use ethanol free. These cars were designed to have ethanol in the fuel system, if you owned say and E30 or E36 then it would be recommended to run ethanol free because it would stop damage to valve seats and seals.
You must be thinking of leaded gas, and even then E30 and E36 are too new to need it. Ethanol doesn't have any effect on valve seats or seals.
VpointVick is offline   Reply With Quote
Old 12-03-2019, 08:36 AM   #7
wfx32
Registered User
 
Join Date: Dec 2018
Location: VA USA
Posts: 694
My Ride: AWD
Model: 330XI 08/2004
Transmission: auto
ok so say bmw plastic and rubber are impervious to ethanol .. but what about the water/condensation issue?

ethanol is ok if you drive the car every day, but not as stable as regular gas.
wfx32 is offline   Reply With Quote
Old 12-03-2019, 09:52 AM   #8
TerraPhantm
Registered User
 
Join Date: Feb 2008
Location: Philadelphia
Posts: 7,550
My Ride: M3
Quote:
Originally Posted by wfx32 View Post
ok so say bmw plastic and rubber are impervious to ethanol .. but what about the water/condensation issue?

ethanol is ok if you drive the car every day, but not as stable as regular gas.
It's not going to be that big of an issue. I've left my M3 parked for the better part of a year, and had no trouble afterwards.
__________________

To view links or images in signatures your post count must be 0 or greater. You currently have 0 posts.
TerraPhantm is offline   Reply With Quote
Old 12-03-2019, 02:02 PM   #9
Newbimer
Registered User
 
Join Date: Dec 2017
Location: Toronto
Posts: 309
My Ride: 2005 325i
The next time you replace the fuel pump get a piece of clear 3/8 tubing plastic or glass, just needs to be stiff. Stand it up in the gas tank and cover the top with your finger, pull it out and see if and how much water you have in the bottom. If its near the halfway mark, you definitely need to remove it. Alternately you could add some food coloring, which is soluble in water but not gas to the tank and see how big the glob in the bottom is.
Newbimer is offline   Reply With Quote
Old 12-04-2019, 06:35 PM   #10
wfx32
Registered User
 
Join Date: Dec 2018
Location: VA USA
Posts: 694
My Ride: AWD
Model: 330XI 08/2004
Transmission: auto
Quote:
Originally Posted by Newbimer View Post
The next time you replace the fuel pump get a piece of clear 3/8 tubing plastic or glass, just needs to be stiff. Stand it up in the gas tank and cover the top with your finger, pull it out and see if and how much water you have in the bottom. If its near the halfway mark, you definitely need to remove it. Alternately you could add some food coloring, which is soluble in water but not gas to the tank and see how big the glob in the bottom is.
thanks i will try this. good timing since i am hoping that replacing the fuel filter and fuel pump will solve the occasional misfire.
wfx32 is offline   Reply With Quote
Reply

Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes Rate This Thread
Rate This Thread:

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 On
Censor is ON



All times are GMT -5. The time now is 02:33 AM.


Powered by vBulletin® Version 3.8.8
Copyright ©2000 - 2019, vBulletin Solutions, Inc.
vBulletin Security provided by vBSecurity v2.2.2 (Pro) - vBulletin Mods & Addons Copyright © 2019 DragonByte Technologies Ltd.
(c) 1999 - VerticalScope Inc. All rights reserved.