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  #1  
Old 01-11-2016, 04:35 PM
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WingedFrog WingedFrog is offline
 
Join Date: Mar 2010
Location: Raleigh, NC
Posts: 843
Default Ethanol Free Fuel Issue

I have been usng Ethanol free gas for two years as I have a service station close to my airport that carries it. Today on my refueling trip I noticed that the price per gallon had dropped almost $1 since last month, nothing close to the drop of regular gasoline. Looking at the pump more carefully I also noticed that the octane displayed for non ethanol was now 89 vs 92 last month. Indeed the appellation of this type of gas is now Plus vs Premium before. I discussed these changes with the owner who told me that their supplier is now receiving Ethanol free gas that is 90.1 octane and has he did not have stickers with this grade to put on his pump he applied the 89 one.
Now the question is: will my Rotax 912 ULS run on 90 octane gasoline?
After a search I found the following thread on the subject:
http://www.vansairforce.com/communit...ad.php?t=87540
I am reintroducing this subject because I suspect that what has happened in my area might also have happened elsewhere. If you are using ethanol free gas watch out next time you refuel your RV-12.
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  #2  
Old 01-11-2016, 05:12 PM
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Piper J3 Piper J3 is offline
 
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Location: Hinckley, Ohio
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Default

You might get better response to this question if asked in the Rotax Forum.... http://www.rotax-owner.com/en/rotax-...ical-questions
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Jim Stricker
Hinckley, Ohio
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  #3  
Old 01-12-2016, 04:04 PM
todehnal todehnal is offline
 
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Location: Kentucky Lakes area in KY
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I think it depends on the supplier. I live in an area of Western Kentucky, near Kentucky Lake, were many station offer what they call boat gas. It is 89 octane ethanol free fuel, which is actually a blend of regular, and premium. I also have a local supplier who sells ethanol free 91 octane. I can get ethanol free 93 octane premium, but I have to drive 60 miles to get it. I do, and carry a 55 gal drum with me. According to that supplier, all of the fuel in our area comes from the same pipeline, located in Nashville TN. He says that only two grades are available, 87 octane regular, and 93 octane premium. He says that anything else is a blend, and that the ethanol is added after the pipe line distribution, not through it. The suppliers blend fuel strictly to lower their cost so that they can offer more competitive pricing. So far, I have been able to get 93 octane premium, but it is at a slightly higher price. For what this is all worth............Tom
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  #4  
Old 01-13-2016, 05:41 AM
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f1rocket f1rocket is offline
 
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Location: Martinsville, IN
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Default

This is why I gave up on using ethanol free fuel. I just use 93 E10 and fly merrily on. It's more important to have the octane than it is to eliminate the alcohol.
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  #5  
Old 01-13-2016, 06:59 AM
N427EF N427EF is offline
 
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Posts: 1,481
Default Amen

Randy has it exactly right.
I cannot understand this crazy obsession with not wanting to use
E10.
As far as I know 93E10 is available everywhere and Rotax engines are approved for running on E10.
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  #6  
Old 01-13-2016, 07:02 AM
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Raymo Raymo is online now
 
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Quote:
Originally Posted by N427EF View Post
Randy has it exactly right.
I cannot understand this crazy obsession with not wanting to use
E10.
As far as I know 93E10 is available everywhere and Rotax engines are approved for running on E10.
Probably because of the shorter "shelf life" of fuels that contain ethanol. I imagine there are other technical reasons too but they've been hashed out on other threads as well.
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  #7  
Old 01-13-2016, 09:48 AM
funflying funflying is offline
 
Join Date: Oct 2006
Location: arvada, co
Posts: 353
Default Good to hear

The success of E10 fuels is good to hear about because getting the ethanol free, 91 octane, is a bit of a drive for me. In the good flying season I use it regularly and fly more frequent. Winter rolls in and I switch to 100LL because of the stability as the plane sits more.

I may start using the 93 E10 this summer and see how it goes.
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  #8  
Old 01-13-2016, 12:18 PM
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Piper J3 Piper J3 is offline
 
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Also, gasoline without alcohol has more BTU content. E10 has 96.7% of the energy of straight gasoline. Doubt if you'd notice...
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Jim Stricker
Hinckley, Ohio
PPL - 1970
80 hrs Flying Aeronca Chief 11AC
1130 hrs Flying 46 Piper J3-Cub
RV-12 E-LSA #120058 AWC 7/12 Bought Flying 10/2015 with 48TT - Hobbs now 228
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  #9  
Old 01-13-2016, 12:35 PM
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johngoodman johngoodman is offline
 
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Location: Peachtree City, Georgia
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Quote:
Originally Posted by f1rocket View Post
This is why I gave up on using ethanol free fuel. I just use 93 E10 and fly merrily on. It's more important to have the octane than it is to eliminate the alcohol.
I am not an expert on fuels, but I started out burning 93 E10 in my LS1 conversion. After 20 hours, I noticed a lot of build up in the filters. I bagged it and took it to a guy who sells 90 E0. He pointed out that it was the same stuff he found when he did a phase separation test. He showed me the test jar, and the same junk that I found was at his phase separation level. Turns out that the yellowish fibers are Corn Silks. The little brown globs are Corn Syrup. I switched over to 90 E0, and also use some 100LL on cross countries. Filters have been clean since then.

John
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  #10  
Old 01-13-2016, 01:35 PM
todehnal todehnal is offline
 
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Location: Kentucky Lakes area in KY
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Take a look at the pictures of the fuel pump that was disassembled recently, and posted on this forum, which shows all of that interior corrosion in just 20 hours of operation, which might be another good reason to keep the ethanol out of your gas, in you can.
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