My MPGs are accurate compared against the car's built in tracking (Honda CRZ) which is within 1MPG (at 45-55 MPG) of what I record from fill-ups. All ...

It seems to work well enough for me, but I haven't collected enough data to be able to compare against the car's counter (which is within ~1% on avera...

Honda CRZ: A 10" tablet doesn't quite fit here... This is more practical, dials are slightly hard to read at this range if you use the small one...

Copying source code is very different from reverse engineering a physical protocol. Patent protection is relevant in protecting proprietary protocols ...

A fairly exhaustive search online yielded very little other than extended PIDs are available for most vehicles, but they are very expensive to purchas...