Land Rover Defender.
@1,216,223 (chester)
When I lived in Cincinnati, a very hilly city, for a few months all I could afford was a Tomos moped, so I rode my little 49cc single cylinder moped all around Cincinnati. Going up hills was hilarious (I am a big guy) and it would almost stop. But man, once I got on level ground and then down hills, it was ridiculous lol. I would zoom down at 60mph or more, getting better than 100 mpg. But even averaging up and down hills, I got a good 70 mpg consistently. What a strange experience.