Testing the corn (E85) @ the pump
You fill the tube up with distilled water up to the line at the bottom, then pump E85 to the line all the way at the top. Turn the tube upside down several times, and let the corn and water seperate. The seperation line will tell you exactly what the octane actually is. Best part about it is, cost only $3.19/gallon

Based on the results of the test, it looks like the summer blend is E90

Last edited by chawkins2001; Jun 22, 2012 at 09:36 AM.
Although e85 is great stuff, I would not recommend it for a daily driver as the mpg are worse than standard pump....
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