Journal Journal: Why is gas so cheap all of a sudden? 1
I know ethanol has approximately 70% of the BTU output that gasoline does, but it's octane rating is higher. I also know that engines cannot automatically increase the compression ratio, so unless an engine is purpose-built to make power from that, any gains from a higher octane rating are lost, but it will still consume 30% more fuel.
I have not noticed any new stickers on the pumps touting, "Now with More Ethanol!" Is there something else being added to the US fuel supply to water it down and lower the price? (MTBE, anyone?) Is there any research going on because of this?