Sasks...Octane is an 8 carbon chain hydorocarbon molecule derived from oil Ethanol is a 3 carbon chain alcohol derived from fermintation of grains. Unless oil companies juice it up, ethanol has no octane in it, chemically speaking of course. They might be making an octane equivalent argument here.
The carbon carbon bond is strong and breaking it will yeild energy, but it takes energy to do it..thus glow plugs in desiel motors along with compression and spark plugs in gas motors. Ethanol has less carbon carbon bonds and an OH ( hydroxy group which makes it an alcohol) makes it yeild less energy than octane chain in regular gasoline.
Bob, Tonya and the kids
11 Rockwood Roo 233S
08 Grady White Seafarer 228
08 Tundra 5.7 liter 4x4 crew cab TRD limited
08 Toyota limited 4 Runner Iforce V8 full time 4WD, tow package