I've noticed this, too. I have a plug-in prius, which only gives you about a 10 mile electric range, so the game ends up being "can I make this trip to X and b

I've noticed this, too. I have a plug-in prius, which only gives you about a 10 mile electric range, so the game ends up being "can I make this trip to X and back without having to burn any gas?" Knowing the terrain in your neighborhoods and knowing the paths that don't involve a lot of elevation change can really make a big difference in whether you "win" this challenge.