Get detailed information on the best MINI gas mileage cars with over 40 MPG online and do side-by-side comparisons to help you with your used car buying. Research used MINI 40 - 50 MPG and fuel efficient pre owned cars with high MPG including EPA fuel economy ratings, miles per gallon, car prices, reviews, cost of ownership, safety, recalls, standard features, options, warranty, fuel economy, specifications, and more on any 40 - 50 MPG MINI used car models. Click on the links below to find the right vehicle for you!