I'm new to Hybrid ownership and the "lifestyle". I wanted to start tracking my cars efficiency over time and saw that their are lots of apps available to track MPG. I' currently using "GAS CUBBY" (free version). I'm curious to what everyone else is using and their opinion as which was the best. Thanks!

 

Pencil and paper.....the batteries have never run down, they stay in the car and you can even get them in your choice of colors......

 

Yes, the efficiency is guaranteed. Hybrid batteries are trustworthy.