Top 10 Most Fuel Efficient Used Cars

10. 2006 Scion xB (four-speed automatic transmission) – 28 MPG Combined

In an effort to attract hip, young customers Toyota introduced the Scion brand back in the early 2000s. The move was a departure from its usual business model, selling indestructible transportation to the elderly. Whether it’s succeeded in attracting flocks of kiddies like free hot-air balloon rides is debatable.

What you can’t argue with are the products. They’ve continued the company’s admirable tradition of unsurpassed quality, but with a healthy dose of funk. Scion’s kookiest looking vehicle is undoubtedly the first-generation xB. This tiny cube is the very definition of a box on wheels, and like a piggy bank designed by artist Pablo Picasso this squared-off container is designed to save money.

As one would expect in a subcompact car of this vintage the xB is powered by small-displacement four-cylinder engine. It puts out a meager 103 horsepower and just 101 lb-ft of torque, but thrift is a birthright of this powerplant type. When matched to the optional four-speed automatic transmission the little cube gets 26 miles per gallon in the city and up to 31 highway, making for a combined score of 28 MPG. Once again, small cars = big fuel economy.