In light of this information I decided to do a write up on how to make your own Ethanol Tester from stuff you can buy at most stores, and I'll explain how to use it. I wrote this little excel Ethanol Content file myself, so if there are any bugs, thats why. This is my first attempt at a DIY or a write up so if it sucks... well thats why again.
What you need....1. Baby bottle (with graduations - lines that measure whats inside. Get one with the smallest graduations you can find, makes it easier to get readings later.)
2. Rubber Glove (could be optional)
3. Ethanol Content xlm file (100% optional, use this if you dont want to do the math) File is here on my Google Docs (you must download the file to use it)
NOTE: The xml file is picky about blank characters in the boxes, I plan to replace the XML in this write up with a excel file that can be ran from google docs, removing the need to download the file or have excel on your computer.
Update: The xml file had some issues so a stand alone app was made, look here for the download. http://hagensdiy.blogspot.com/2013/01/ethanol-content-update.html
What you do.....
Step 1.(if not using the xlm file skip to step two and ignore the part where you are entering info into the program)
Open the xlm file and be sure to click "Enable macros" if you are asked.
Next Click on the button to launch the Ethanol Content Analyzer Form
Now you are ready to use your baby bottle. (If you have a baby at home, it may be a good idea to mark your bottle as do not Drink this had bad stuff in it.)
Take your empty Baby bottle and add water to one of the lines on the side (units will not matter here just be sure to be consistant with the units you choose)
Add fuel up to another marked line on your bottle. (I over shot by a hair)
Put the rubber glove across the top of your bottle and screw your lid on. Shake the bottle up then place on a flat level surface and let sit for a few min.
The water and ethanol will mix and the "gas" will float on the top of the water. Look for this line of separation.
Note: Better picture at the bottom of blog.
(using white or colored paper behind the bottle can help you see the line)
Enter this reading into the Separation Reading in the program.
Now click the Calculate button and you will get a % Ethanol reading in the green box.
I also should have used the ml units as they are closer together and may have been a little easier to judge on the separation line.
(or if you are not using the program now you get to do math. Take the quantity of the separation reading minus the water reading divided by the quantity of the water + fuel reading minus the water reading.)
Good luck with your Ethanol adventures. And feedback is always appreciated.
So I tested some fresh e85 from conrad and bischoff, 3-19-12, here in Idaho Falls ID.
Here is a much better picture showing the separation, and the program showing what it tests at.