CarMD Vehicle Health System compare

The CarMD Vehicle Health System turns up very limited data compared with the cost of the device, and it offers few real features.

During the course of our testing, the Bully Dog WatchDog proved to be alternately simple enough for a novice to use and complex enough for our car geek tastes. It'll help you boost your fuel economy within reasonable limits, but don't expect it to be an mpg magic bullet.

The 2012 Toyota Camry XLE lives up to the solid reputation of the model, but the new Entune system's problems kept it from cabin tech excellence. Overall, the Camry Hybrid seems a much better bet for fuel economy and power.

The 2013 Porsche Boxster delivers fantastically balanced performance and full-featured tech, but avoid expensive luxury items for the best value.