They (40+mpg folks) must've recorded the miles between 2 fillups. LOL - just kidding. Seriously though Last fillup to running out this last time, I had 152 miles go up on the odo. And it was completely full up to dripping out the filler tube. You tell me?
My car is a '77, with ZS, but no water "choke". I have the "choke" lever tied off at it's leanest point. It still starts on the first crank even at 10 degrees. When the weather is warm, it builds carbon at a stoplight - takes 2-3 gears to blow a smokescreen, then it runs fine til the next stop.