[UFO]

While I admire your dedication and rigor in getting to the solution of your perception of the pollution problem, my perception is different. I think reducing ones overall fuel use is cutting a far more dangerous pollution, not just in the amount of CO2 emissions of ones vehicle, but in the amount of pollution created in manufacturing and delivering the massive amount of fuel to the pump.

But it's all good. Your choices are yours, and mine are mine alone. I have chosen to drive diesels on biodiesel, and that meets my expectations in helping to not pollute.