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BMW 3-Series (E90 E92) Forum > E90 / E92 / E93 3-series Powertrain and Drivetrain Discussions > N54 Turbo Engine / Drivetrain / Exhaust Modifications - 335i > How are N54 engines in Brazil coping with 20% ethanol?



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      12-26-2012, 11:26 AM   #1
Jeffman
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How are N54 engines in Brazil coping with 20% ethanol?

People in the US are interested in adding even more ethanol to gas to make, perhaps E20, 20% ethanol and 80% gasoline. Apparently Brazil has been using this ethanol blended gas for many years. I am curious if there are any N54 owners in Brazil who can comment on their experience. Did you have any mechanical problems with your cars because of the higher ethanol amount? Are cars in Brazil modified in some way to handle the 20% ethanol fuel? Thanks.

[Note: I posted this question several months ago in the South America Regional Forum, but no one replied.]
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      12-26-2012, 11:41 AM   #2
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I've been running E30-E40 mixtures for about a year and a half now with various tunes (JB4 and now Cobb) without issues. I have thrown 29F3 which is the low pressure fuel sensor code for the longest time, but I am not positive if it was due to ethanol or not. I replaced the sensor and everything has been golden with no issues related to ethanol in my system.

Oh and my car goes like stink too!
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      12-26-2012, 12:20 PM   #3
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E20 isn't that big of a deal. Especially when (legally) all gas sold in the United States can have up to 10% ethanol (E10) content. Another 10% probably would eliminate any timing corrections on the stock settings.
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      12-26-2012, 12:58 PM   #4
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I have gone over 35k at 50% mix now. No issues.
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      12-26-2012, 02:08 PM   #5
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20% on stock fueling will probably just smooth out timing and add a bit of power, I think it's the aggressive mixes that guys are really curious about, say over 40%.
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      12-27-2012, 02:14 PM   #6
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I've been running e30-e40 for the last 6 months or so, and no issues on the stock fuel system. Any more than that, and I get the low pressure fuel sensor code that RnmEvo9 posted above. But I'd only get the code during light load cruising, and it never had any issues during hard accelerating.

Last edited by JO3; 12-27-2012 at 07:49 PM.
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      12-27-2012, 05:05 PM   #7
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I have been running an E30 mix for over a year and a half and probably about 25,000 miles and I had LPFP issues with the regular JB4 with the 18ohm resistors with that mix. When I switched over to the JB4 15ohm board for some reason I could run more E85. Now, with the JB4 G5 ISO, I can run up to about a 60% mix without ANY codes. I think with just a basic tune an E30 mix is ok. If your trying to get big numbers and have the latest and greatest tune like the JB4 G5 ISO with the BMS flash or the Proceed Rev3 with the flex fuel system and Shiv's flash then you can def run an E40 or more mix no problem on the stock fuel system from my experience and from what I have read. I have a buddy with the Proceed Rev3 with flex fuel and flash running 100% E85 and he isnt having any problems as of yet. But its only been about 3 weeks or so. We will see how long it will hold up in a couple months down the road.
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      12-27-2012, 08:16 PM   #8
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Quote:
Originally Posted by boostaholic786 View Post
I have been running an E30 mix for over a year and a half and probably about 25,000 miles and I had LPFP issues with the regular JB4 with the 18ohm resistors with that mix. When I switched over to the JB4 15ohm board for some reason I could run more E85. Now, with the JB4 G5 ISO, I can run up to about a 60% mix without ANY codes. I think with just a basic tune an E30 mix is ok. If your trying to get big numbers and have the latest and greatest tune like the JB4 G5 ISO with the BMS flash or the Proceed Rev3 with the flex fuel system and Shiv's flash then you can def run an E40 or more mix no problem on the stock fuel system from my experience and from what I have read. I have a buddy with the Proceed Rev3 with flex fuel and flash running 100% E85 and he isnt having any problems as of yet. But its only been about 3 weeks or so. We will see how long it will hold up in a couple months down the road.
Are you getting your E85 at a Kroger?
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      12-28-2012, 12:19 PM   #9
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Thanks to everyone who replied. The data from the folks with +25K miles running E30 or higher is encouraging. Also, if anyone reading this is from Brazil can you also reply? Thanks.
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      12-31-2012, 09:21 AM   #10
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Interesting press release by AAA regarding 15% ethanol...

http://www.autoblog.com/2012/12/04/a...les/#continued
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      01-01-2013, 10:42 AM   #11
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Originally Posted by starbai View Post
Interesting press release by AAA regarding 15% ethanol...

http://www.autoblog.com/2012/12/04/a...les/#continued
Yes. I saw this, too. Obviously AAA is worried about an increase number of service calls from its members who have older cars that can't handle E15. It's obviously a business decision on AAA's part to attempt to control the quality of fuel to minimize future costs. I'd do the same if I managed AAA.
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      01-01-2013, 12:45 PM   #12
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Interesting, my wife can tell if I am using E25 or not. She said the car runs more smoother when on E25.
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      01-01-2013, 01:40 PM   #13
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Originally Posted by BuraQ View Post
Interesting, my wife can tell if I am using E25 or not. She said the car runs more smoother when on E25.
You are a brave man. My wife doesn't drive my car. (Of course, I would say yes if she asked.)
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