[PAR35]

gasoline and/or natural compressed gas in any proportion in the same tank.

I'd like to see the filler hose that takes both gas and liquid. Shoot, I'd like to see them pump in gasoline while the tank is a quarter full of CNG - from a safe distance, of course.

[P-40]

I'd like to see the filler hose that takes both gas and liquid.

That 'one tank' bit sounds a little strange. Gasoline and butanol I could see getting along quite well, but gasoline and E100, or pure alcohol? I don't think so. And adding a compressed gas to the mix? Would it be okay to still smoke while filling up?