Designing hybrid and eco-friendly cars is never ending. Currently a new design called the XR3 Hybrid Plug-in Car ha been revealed. This two-seater car has the ability to achieve 225 miles per gallon and is powered to propel by a combination of battery and diesel. Consisting of only three wheels, this sleek and stylish car weighs only about 1480 pounds and has a top speed of 80 miles per hour. The sad part of it is its unavailability to our local dealers. Anyone interested to own one must have to buy plans to the manufacturer and build it him or herself, which on the other hand allow them to improve the mileage that will save them energy in the process.