Wow, my wife ended up with an auto Ecosport 1.0 and gets 8 litres per 100km pretty consistently (lower on a long trip).
Other cars have done:
Mazda 3 1.6MT - 8
Suzuki SX4 2.0MT - 7
I think you're onto something. A small engine has to work hard, a big understressed engine doesn't break a...