Is Bio Ethanol Gas bad for your vehicle?

[andestang]

This doesn't make sense. Octane is not a compound, it's a measurement. The octane rating is "a measurement of the resistance of petrol fuels to auto-ignition in spark-ignition internal combustion engines". Octane rating does not relate to the energy content of the fuel, it is only a measurement of the fuel's tendency to burn in a controlled manner, rather than exploding in an uncontrolled manner. Ethanol is basically an alcohol ( biologically produced)and by itself can have an octane rating of 110 or higher, but its heating value lacks (the energy released as heat). And for fuel economy you will not get the mileage that FFV's will get running on Ethanol. Hope this makes more sense.

Originally Posted by Funky_Fish14

Ethanol cant have a higher octane rating.... They are different chemical compounds? That does not make sense?

The mileage difference with the husky(ethanol containing) stuff though is still better MPG (or I prefer L/100K) on mid-grade or premium than with other regular gasses. Just tossing that out there. I dont think there is enough ethanol in it to make that much of a mileage difference.

But it is absolutely correct to say that per molecule the energy density is higher in octane than in ethanol.