[RipSawyer]

I can tell you what I don’t get. I have run my own tests over and over and always have gotten approximately eight percent lower mileage on ten percent ethanol compared to pure gasoline. That means you can go nearly the same distance on the nine tenths of a gallon of pure gasoline WITHOUT the one tenth of a gallon of ethanol. To me that means that whatever other factors you quote mean nothing, it still doesn’t make sense to add ethanol to gasoline. What you said about every gallon of ethanol meaning two thirds of a gallon of petroleum we don’t need to buy from the middle East seems to me to be made up out of whole cloth.

[E. Pluribus Unum]

Ethanol has 60% of the BTUs of gasoline, so theoretically a 10% ethanol blend will give you 4% less gas mileage.

I’m not doubting that you get 8% less, I am just stating that the BEST you are going to do is 4% less, and since ethanol does not burn as well as gasoline it’s no surprise it’s even worse than that.

[Governor Dinwiddie]

What is really funny is that when you travel around Iowa and Nebraska there is an ubiquitous chain of "gas and go" convenience stores called Casey's General Stores which sell ethanol-free gasoline—100% pure gasoline.

These stores are everywhere in the region, and almost all of them sell real gasoline. The humor is that these are ethanol states. It reminds one of the old saw "rules for thee, but not for me."

I congratulate the Casey's chain for offering their customers the choice.

[RockyTx]

Rip.

how much energy-content are you measuring
for your reference, and test batches, of fuel.
lets start there.