MPGuino, "current mileage" questions.
 

So, I just put a fuel cutout relay and separate push to start switch in my car, to make things easier for EOC. I also ran a start sw right from the start relay to a ignition wire that is hot with the key in the ON position. Can I change my MPGuino settings, so that if I sit at stoplight for 2 minutes or so, the current mileage doesn't reset? It really seems to but related to the time I have the engine of, so I suspect that it's a setting I can configure, but I don't know which one it would be.

Yes, definitely. In setup, change "current Trip Reset Timeout" to a larger number. You could also change it in the code (should be easy to find) if you reflash your MPGuino with the latest code.