all the stations i've seen locally JUST say "up to 10% ethanol." the higher the octane, the higher the price, so i guess i'm out of luck.

thank you all.

regular is like $3.97 a gal while e85 is $2.99

Almost $1/gal less makes it more worth it. Around here the few stations that have it charge the same as their 87 octane unleaded.

-Jay

ya i think 20 cents cheaper is the break even point

Break even point would be more easily figured and described as percent, should be about the same as the hit in mileage...

In the St. Louis area, E85 is consitantly $.50 cheaper then Regular Unleaded.

what you will find, is there will be varying answers to this. Its going to depend on state, and even locality. Here in NY, I do not believe I have seen a single station selling E85 at all. Also, I thought I had seen % of ethanol content on gas pumps here in the past but still lately have not seen one. I thought NY was also one of the states that required 10% in all gas but a search I did a few months back did not indicate NY mandated it.

I did find a test using a graduated cylinder and water to determine the % ethanol in pump gas. Apparently ethanol will come out of solution from the gasoline and mix with the water. The change in the water content of the content of the gas and water in the cylinder will tell you the % of E in the gas.

i understand it could be different for each state, brand, or even batch.

what i'd like to find out is those that have the option of straight gas, how do you know?

E10(or E0) is in question, not E85.

Nice, thanks! Can see how that will work, measuring cylinder with say 50ml of water in it, add 200ml of gas on top, cork it and shake the hell out of it.... leave it to stand... if the separation point is at 70ml you have 10%, 60ml you have 5% 50ml, zip. (Though I think I've heard that you can manage to get a percent or two water dissolved in some gas blends sometimes)