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E90/E91/E92/E93 (2006 - 2013)
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  #1  
Old 11-06-2013, 08:26 AM
Otherbmw Otherbmw is offline
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To fill or not to fill (gas tank for winter storage)

I'm storing my 335 E93 for the winter (about 5 months) and was wondering the opinion on filling the gas tank all the way up or actually leaving it with only a small amount of gas. I've done a search and have seen both arguments: filling it up prevents condensation in the fuel tank but since the tank is Aluminum there isn't much of a concern. The argument against filling is that even with fuel stabilizer the gas can get quite stale and you'll have to run this through in the spring. Keeping the tank low will allow you to burn through the old gas quickly then allowing you to fill it up with fresh gas.

Opinions?
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  #2  
Old 11-06-2013, 09:03 AM
Miller335 Miller335 is offline
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I would fill if it were me. Worst case you siphon most of it out if it can't be stabilized.
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  #3  
Old 11-06-2013, 09:24 AM
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Zooks527 Zooks527 is offline
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I'd go the other way. Having had to siphon out a tank of bad gas from a stored car, I'd run add stabilizer to whatever is in the tank now, then run it very low. I'd fill the tank before starting it in the spring.

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  #4  
Old 11-06-2013, 09:56 AM
rdorman rdorman is offline
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Fill it, add stabilizer, pull pump fuse/relay, let run until it dies, replace pump fuse/relay. There should be no debate on the subject.
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  #5  
Old 11-06-2013, 10:11 AM
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DSXMachina DSXMachina is offline
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Quote:
Originally Posted by rdorman View Post
Fill it, add stabilizer, pull pump fuse/relay, let run until it dies, replace pump fuse/relay. There should be no debate on the subject.
Ditto. I've seen them all. I have many customers with classic, exotic and mega-exotic cars which see long periods of non-use or Winter storage in New England. They all follow this procedure.
Add fuel stabilizer to half a tank, fill the tank, keep the filler cap tight and park it. It'll still be as good as the day you parked it come Spring.
Cars with crap in the tank in the Spring had crap in the tank the prior Fall.
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  #6  
Old 11-06-2013, 11:26 AM
Rainman519 Rainman519 is offline
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just put my Z4 to sleep for the Winter. Ran the tank almost empty, filled with 93 octane, over-inflated the tires, added battery tendr and cover, and she'll be good as new in Spring. I should add that I start it and move it around a couple of times during the Winter, then put it right back.
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  #7  
Old 11-06-2013, 11:49 AM
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floydarogers floydarogers is offline
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Quote:
Originally Posted by Otherbmw View Post
I'm storing my 335 E93 for the winter (about 5 months) and was wondering the opinion on filling the gas tank all the way up or actually leaving it with only a small amount of gas. I've done a search and have seen both arguments: filling it up prevents condensation in the fuel tank but since the tank is Aluminum there isn't much of a concern. The argument against filling is that even with fuel stabilizer the gas can get quite stale and you'll have to run this through in the spring. Keeping the tank low will allow you to burn through the old gas quickly then allowing you to fill it up with fresh gas.

Opinions?
It's go to "Pittsford Auto Service [585-586-1611] 58 Monroe Ave" and get a tank of ethanol-free gasoline and call it good. http://pure-gas.org/?stateprov=NY
Or, you can add some stabilizer, too.
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  #8  
Old 11-09-2013, 10:56 AM
calgaryx3 calgaryx3 is offline
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I keep the tanks in both E90s fairly close to empty during winter storage. The garage is heated, and stays at a constant 50F all winter without any major temperature fluctuations (bay door opening and closing), thereby minimizing condensation issues in the fuel lines.

I realize there are debates either way with this subject, however, I have stored my vehicles this way for some 25 years now without any noteworthy issues.

Asif
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  #9  
Old 11-09-2013, 11:12 AM
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vst335is vst335is is online now
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To fill or not to fill (gas tank for winter storage)

Quote:
Originally Posted by Rainman519 View Post
just put my Z4 to sleep for the Winter. Ran the tank almost empty, filled with 93 octane, over-inflated the tires, added battery tendr and cover, and she'll be good as new in Spring. I should add that I start it and move it around a couple of times during the Winter, then put it right back.
Do you change your oil too prior to drive it in the Spring? What's the oil change rule for winter storage? I heard some change the oil before, some change it after the winter is over. Some even tow the car to the dealership to change the oil. I usually change oil once a year in July and store it for winter about 5-6 months, so far no issues but it's been only 1 year, and drive about 6000 miles a year.


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Last edited by vst335is; 11-09-2013 at 11:14 AM.
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  #10  
Old 11-15-2013, 06:38 PM
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vst335is vst335is is online now
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To fill or not to fill (gas tank for winter storage)

Any recommendations for oil change? Change it once a year or after winter storage?


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  #11  
Old 11-15-2013, 07:49 PM
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bear-avhistory bear-avhistory is offline
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I would change it before run it to circulate the oil then shut it down......have no idea if its the answer but it seems logical to me. No sense leaving it to sit full of dirty oil. Do agree full tank with fuel stabilizer.
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  #12  
Old 11-16-2013, 04:29 PM
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vst335is vst335is is online now
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To fill or not to fill (gas tank for winter storage)

Bmw techs actually recommend to change oil after the winter storage, they say fresh oil contaminates more than the current oil in the engine. In my case I drove 3K miles with the oil, and in the spring I'll do oil change. Drive another 3-5K and store it. An so on


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