[MiamiM3]

I have been running E50 in my car for a couple of months now and I curious how the 335i fuel system will hold up over time. Is the fuel system going to deteriorate prematurely running E85? Do you have any actual examples of fuel system component failures created by running E85? I am not looking for speculation or "BMW states this". I want actual facts, no BS. I love how the car runs on E50, I have total confidence in the car every time I hammer it on E50.

[zmon1300]

Do you have a tune on your car? Capable of logging? Log some WOT 3rd gear pulls and be sure that it's logging your lpfp. Send them to a tuner or on the forums here and then u will be able to see how your lpfp is holding up.

[Turbo_power4ever]

+1 i was wondering the same thing. Im running e55 and was going to buy inlets and throttle body injection to run 100% e85

[firemanjust1]

Man you cant run e85 in non flex fuel vehicle lol. No offense but your post sounds like a post from the year 2012. I pretty sure the consensus is yes you can run e85 and no it will not hurt anything.

[Miller335]

It's gunna blow.

[Digitalism]

I think what the OP is getting at is will long term E85 use have a deteriorating effect on parts when compared to non-E85 use.

Will the HPFP last x amount of kms on E85 compared to 91/93 octane fuel.

As most know that are cars are capable of running E85 long term.

[MiamiM3]

Originally Posted by Digitalism

I think what the OP is getting at is will long term E85 use have a deteriorating effect on parts when compared to non-E85 use.

Will the HPFP last x amount of kms on E85 compared to 91/93 octane fuel.

As most know that are cars are capable of running E85 long term.

Thank you for clarifying, this is exactly what I am asking. I am not concerned about bolt-ons and tune (PTF E50 and FMIC + CP). I want to know if long term use of E50 will degrade the fuel lines, o-rings, LPFP or HPFP.

[csu87]

I've been running an e85 mix for awhile now and 100% e85 for a little bit with no noticeable issues

[ttbmer]

i don't run e85 and never have. but I'm just going to shape my coworker experience since all we do at work is talk about cars, mostly his set up lol, I'm a great listener lol. he's car ran into some issues 2 weeks ago do to the fact that his running e85 and some parts from his fuel system were corroded even when his set up cost over 40 grand and his total set is over 100k. just to give guys an idea he owns the fastest porsche in the world, currently making over 1800 whp. his tunner recommended that he run 1 full talk of regular gas at least once a month to clean the system because e85 is corrosive. hope that helps you.

[MNick]

I have about 15000 miles on E60-70 without issue. I am well over due (8months) to run a tank of 93.

[idratherbesurfing]

I don't always drive my car so when I know it's going to sit in the garage for a while I will make sure I fill the tank up with straight 93 because e85 is corrosive and I as well don't want to prematurely deteriorate anything for no reason. It's not even a question that e85 is corrosive but like you said I have not seen anyone with our fueling system fall apart yet other than due to faulty parts.

[musc]

Over 2 years running E60+ and no straight 93 in over a year. Car is not daily driven and can sit a week or more in between drives. Zero issues related to fueling. Our cars are sold in markets abroad where E25 is common and no changes are made from the fueling system we get.

[stanlalee]

135k. Been running e30-40 since 70k. Not a single injector, line, pump or fuel system component has failed or needed replacing (at least since I've owned it).

[///Mposter]

For storage or a car that is sitting for weeks , you must use Stabil or other brand of E85 stabilizer. It stops the gasoline from separating from the ethanol. Ethanol attracts water and a spoonful of water can separate a gallon of e85. There are videos of this. That's the corrosive part as water is the item that can cause fuel pump lock-up. Fuel is the lubricant .

As for line deterioration , if you look at the fuel pump installs BMW uses nylon e85 compatible flex hose. In other areas there may be rubber hose that is compatible with e85 inside but not submerged. Up in the engine area, it's hard lines.

Then there is the injector issues with e85 that some people have discovered that gunk up injectors. Some people have stated that it was like a syrup sticky mess. This can be combated with Lucas fuel cleaner for e85. It's so slick it helps the fuel pump lubricate, and the detergents clean the injectors.
If it's any clue that I've lasted this long on series -01 injectors.

That's all I know and I hope it's helpful.

[Stucks]

I Have ran ethanol mixes for 2 1/2 years straight; car hasnt seen a tank of just pump 93 gas that entire time either. car runs good.

[Grand_hustle17]

Mine is only driven once a week maybe once every other week now... Have 3 gal of e85 in there.. Last time i went to gas station in car is a month ago.. Seem fine

[924er]

Our fuel lines are silicon based and can resist some corrosive behavior. I remember SteveAZ talked about this in the past.

The problem you may have is killing your LPFP if your demand is too high for it to keep up with the e85. That's why you need to log some runs and make sure the PSI doesn't drop below 50 or remain at 50.

It's not about how much e85 you can run on a stock fuel setup it's about how you tune it. Running a stock setup will force the tuner to sacrifice midrange power(which is what the n54 is good at) An upgraded LPFP will allow the tuner to add more power.

Now when I first started running e85 my HPFP died but that was a coincidence. Since last year I haven't had any issues with running e30 Cobb. E85 makes a night and day difference.

[csu87]

my car sits for up to a month at a time with no issue with a full tank of e85

however with the cold weather, it is a pain to start.

[jgoens]

Originally Posted by csu87

my car sits for up to a month at a time with no issue with a full tank of e85

however with the cold weather, it is a pain to start.

Ah..maybe that's why my car has needed and extra crank or two this week with the cold weather (40-50 degrees, which is cold by our Cali standards).

[csu87]

Originally Posted by jgoens

Ah..maybe that's why my car has needed and extra crank or two this week with the cold weather (40-50 degrees, which is cold by our Cali standards).

try doing it in 10 degree weather. embarrassing sometimes when it wont start on the 2nd/ 3rd time. Main reason im switching over to pump gas and meth, at least for the winter.

[JDuke335i]

Originally Posted by csu87

try doing it in 10 degree weather. embarrassing sometimes when it wont start on the 2nd/ 3rd time. Main reason im switching over to pump gas and meth, at least for the winter.

When it's cold , I push the start button and wait 1-2 sec , and it cranks right up. B4 I started doing that , it would take a bit.

[Milan]

Originally Posted by ttbmer

i don't run e85 and never have. but I'm just going to shape my coworker experience since all we do at work is talk about cars, mostly his set up lol, I'm a great listener lol. he's car ran into some issues 2 weeks ago do to the fact that his running e85 and some parts from his fuel system were corroded even when his set up cost over 40 grand and his total set is over 100k. just to give guys an idea he owns the fastest porsche in the world, currently making over 1800 whp. his tunner recommended that he run 1 full talk of regular gas at least once a month to clean the system because e85 is corrosive. hope that helps you.

His tuner probably said that because he is probably running ID2000 injectors which have a problem with gumming up with e85. The fix for that is to run pump gas through them.

No offense to you, but your post is a perfect example of how misinformation gets spread.