>evaporative emissions are higher. Well, if you put the gasoline in an open bucket there are some blends that have a fraction which would evaporate faster beca

>evaporative emissions are higher. Well, if you put the gasoline in an open bucket there are some blends that have a fraction which would evaporate faster because of the alcohol content. This was some of the low-hanging fruit that was addressed when ventilated fuel tanks were deprecated, even while leaded gas had not been replaced. You should have seen the amounts of liquid butane that used to be blended before evaporative emissions were regulated. The problem was, tailpipe emissions only come out when the engine is running, but evaporative emissions from vented fuel tanks were constant 24/7. With the arrival of non-ventilated fuel systems decades ago, it's actually a draw between plain hydrocarbons and alcohol-enhanced gasoline when it comes to evaporative emissions of the vehicle itself. >because people are driving modern cars with modern emission systems Exactly why Ethanol is not the problem that people think when they let rumors or superstition prevail. It's mainly during the time your gas cap is off, when your fuel system is not "sealed" and you are fueling up where the slight differential in evaporative losses would show up if there was careful measurement. You can sometimes even notice more vapors escaping while you are in the process. Put your gas cap on properly and the remainder of 24/7 there will be no difference in evaporative emissions (VOCs) between conventional hydrocarbons and alcohol-enhanced, until you open the gas cap again to refuel. It does add up but the overall difference is so small when you do the math that's why it would be almost a complete draw. >because we live in the future After all, it's all we've got left :) One thing that can help make the future more futuristic is when physical reality can be better recognized over myths and misconceptions.