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how long can E10 sit before it causes problems?

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how long can E10 sit before it causes problems?

Old 01-20-2011, 11:08 AM
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Default how long can E10 sit before it causes problems?

my 60 gallon tank is currently about 75% full of E10. The boat has not been run for more than a few minutes for about 2 months. I have run the engine on the muffs for 10-15 minutes a couple of times in those 2 months. I will be installing my new verado in the next month and I am wondering if I need to empty the tank and fill it again with E0


thanks for any info
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Old 01-20-2011, 11:14 AM
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Usually 3 maybe 4 months maybe longer if treated. How large is your tank? Maybe top it off with non ethanol fuel. Now that said if you have the option of non ethanol fuel you will be money ahead not to use E-10 anylonger.

I never use E-10 in anything that I own and I never have fuel related problems. Also I never treat my fuel with Stabil or other similar. My boat is usually laid up from Dec - April since I live in the mid-West.
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Old 01-20-2011, 11:16 AM
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Add some fresh e10 you will good at only 2 months.... I agree given the option non E10 is definitely better
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Old 01-20-2011, 11:16 AM
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Originally Posted by jopheso View Post
my 60 gallon tank is currently about 75% full of E10. The boat has not been run for more than a few minutes for about 2 months. I have run the engine on the muffs for 10-15 minutes a couple of times in those 2 months. I will be installing my new verado in the next month and I am wondering if I need to empty the tank and fill it again with E0


thanks for any info
How old is the gas? With the cost of outboard motors, I would personally rather siphon it out and burn it in one of my cars.
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Old 01-20-2011, 11:33 AM
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the tank is 60 gallons. I do have the option of E0 and plan to go that route in the future. I dont want to take any chances with the new motor it is litterally worth more than the rest of the boat and trailer combined
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Old 01-20-2011, 12:29 PM
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E-10 probably doesn't last any more or less time than E-0, gas starts to deteriorate almost immediately after manufacture, and continues whether it remains 'gas' or is mixed into 'fuel' (howz that, Ron). Adding fresh fuel will result in a mixture that is better than the old fuel but not as good as the new. And it will continue to deteriorate. The problem with E-10 (solvent issues aside) comes from phase separation due to water saturation of the ethanol, a phenomenon we hear bunches about but few experience ...
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Old 01-20-2011, 03:12 PM
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If you added E10 stabilizer (green, not pink) then you are probably fine. A buddy builds gas stations and that is where my info comes from. E10 itself is fine, but it is prone to attracting water and separating the ethanol from the gas. Ethanol separation is basically a sludge that sinks to the bottom of the tank....right where your fuel pickup tube is. E10 does deteriorate faster....and I ended up with a test that proved it.

Several years ago I built new I/O engines that needed 93 octane. We had a bad fuel injector and blew one up in the first 2 hours running. The boat had just been filled up with E10 and sat 5-6 weeks until we re-built the one engine. When we got it back on the water something just didn't feel right and I was scared of more problems. So, I flew the tech out the dyno/programmed the computers to come check out the engines in the boat. His equipment said the knock sensors were going off....even in the engine we hadn't touched. He swore it was fuel related so we eventually hooked 6 gallon O/B tanks up and went for a test run.....everything was fine!!!! Burned off that tank carefully and filled with fresh and the boat performed like it should have for 4 more years til I sold it.
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Old 01-20-2011, 03:47 PM
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What Verado (HP) are you getting?
Gen II, right?

You may already know, but just in case.
www.veradoclub.com

Welcome to the V Family!



.
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Old 01-20-2011, 04:16 PM
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No guarantees here, but I've used fuel that has sat in a tank for several years with no ill effects. Knock on wood.
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Old 01-20-2011, 04:24 PM
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Originally Posted by davidkuhlmann View Post
Usually 3 maybe 4 months maybe longer if treated. How large is your tank? Maybe top it off with non ethanol fuel. Now that said if you have the option of non ethanol fuel you will be money ahead not to use E-10 anylonger.

I never use E-10 in anything that I own and I never have fuel related problems. Also I never treat my fuel with Stabil or other similar. My boat is usually laid up from Dec - April since I live in the mid-West.
Don't mix the 2 type of gas's . Will curl the E10
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Old 01-20-2011, 04:27 PM
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Originally Posted by mtcfish View Post
Don't mix the 2 type of gas's . Will curl the E10
I know and have no intention of doing so. E10 will never enter my tank.
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Old 01-20-2011, 04:32 PM
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Originally Posted by mtcfish View Post
Don't mix the 2 type of gas's . Will curl the E10
That's a crock. Do it every year when we go to NC with no ill effects in 5 or more years.
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Old 01-20-2011, 04:37 PM
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I've had my F150 powered Sea Hunt stored for 7 months with a full tank of E-10 and no fuel stabilizers with no ill effects. Usually it's only stored for 3 months every summer. I only used E-0 on it for one year then had to go to E-10 as I hauled it all over the US. No problems in 6 yrs of use.
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Old 01-20-2011, 04:56 PM
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I love that some of you people will never allow it in your gas tank, or would even consider siphoning it out, but for those living in a nanny state like Massachusetts, we have no choice. We ALL have e10, all of the time, and it sits in the tank all f'ing winter. That's why we are so grouchy - you guys are still enjoying your boats!

I always throw in stabil for the last tank or two of the season, and it sits from October until May, with my first new fillup generally sometime in June. But since we all know it sits all winter, we don't even give it a second thought.

As I am typing this, the phone just rang with an automated message - my daughter's school is cancelled again tomorrow for yet another snow day.
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Old 01-20-2011, 04:58 PM
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one little squeak on tht that you cant mix the two fuel types and now everyone is asking about it.
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Old 01-20-2011, 05:00 PM
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LOL Mass that is funny. You only sometimes get a real winter. We get them all the time. Hell most of our temps are around zero this time of year.

Oh and for the record if you have always used E10 there is no problem. It is when you have used non ethanol fuel and the switched. Not the other way around.
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Old 01-20-2011, 05:38 PM
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No problems with the switch either, although that was previous boat when Mass switched over. Just ran MTBE gas almost to empty, then filled up completely with e10. I don't think there's any MTBE around anymore, so for those choosing between e10 and straight gas, there's probably less of an issue switching.

I think the big problem when switching isn't combining of the two, but rather the effect of adding a highly aggressive solvent to your tank for the first time, cleaning/loosening all sorts of crud depending on the state of your fuel system.

Once e10 has "cleaned" your tank, you could probably bop back and forth with no ill effects. The first time cleaning, coupled with issues from older oxygenates (such as mtbe) I think are what gave rise to this "no mixing" stuff.

In other words, I'm not saying switching is ok - I'm saying that I believe the root cause is having a dirty tank used to straight gas getting cleaned for the first time with e10. If you've always used e10 (like my current boat) everything should be fine, and obviously switching from e10 to straight wouldn't cause any immediate problems either.

Did I mention that I hate the winter? If I lived in Iowa, I'd probably shrivel up and die.
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Old 01-20-2011, 07:15 PM
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Originally Posted by BACKTOTHESEA View Post
That's a crock. Do it every year when we go to NC with no ill effects in 5 or more years.
It will cause a reaction when mixed, then sitting for a duration. We have multiple experiments to prove it. MTBE fuel and E10. It forms crystals similar to sugar after 3 months in an aluminum carburetor. Even treated with stabilizer specifically designed for ethanol. Did the same experiment with MTBE only got slight varnish. Ethanol only, stayed clean like its was still fresh. It was slightly discolored however. All test were perform During summer in a high humidity environment.

It's all still a mystery but we are doing our own experiments. I personally think all the problems stem from mixing the two style fuels; I'll tell you this there are more misconceptions on this subject than religion...

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Old 01-20-2011, 07:20 PM
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Originally Posted by jopheso View Post
my 60 gallon tank is currently about 75% full of E10. The boat has not been run for more than a few minutes for about 2 months. I have run the engine on the muffs for 10-15 minutes a couple of times in those 2 months. I will be installing my new verado in the next month and I am wondering if I need to empty the tank and fill it again with E0


thanks for any info
Ethanol is internal combustion cancer, don't feed it to your new Verado's.
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Old 01-20-2011, 07:59 PM
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Originally Posted by marinetommy View Post
It will cause a reaction when mixed, then sitting for a duration. We have multiple experiments to prove it. MTBE fuel and E10. It forms crystals similar to sugar after 3 months in an aluminum carburetor. Even treated with stabilizer specifically designed for ethanol. Did the same experiment with MTBE only got slight varnish. Ethanol only, stayed clean like its was still fresh. It was slightly discolored however. All test were perform During summer in a high humidity environment.

It's all still a mystery but we are doing our own experiments. I personally think all the problems stem from mixing the two style fuels; I'll tell you this there are more misconceptions on this subject than religion...

Tom
Wake-Falls Marine
"We Make Boating Convenient"

send the salt off to a lab for IR spec and get back to us.
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