Can you even get a 10-20mpg car without resorting to niche items like heavy trucks and such, where the buy would be fairly sophisticated in fuel usage consideri

Can you even get a 10-20mpg car without resorting to niche items like heavy trucks and such, where the buy would be fairly sophisticated in fuel usage considering its pretty much a work truck? This probably isn't too big of a concern from a practical standpoint. Avg fuel economy in the USA in 2014 is 24.1. Changes from there are small increments, ignoring hybrids and ultra-efficient vehicles.