[Cd]

Thanks dcb .
Looks like I need to drive my car more.
.
I drive a couple of miles to the grocery store every week or two to keep the battery charged, but that is about it.
The only time that the car gets 'driven' is maybe twice a year when I visit my parents.

Looks like I need to take a road trip to gather more data.

I know that my data for the trip that I took ( see first post ) was pretty accurate.
I would have thought that I could just add or deduct the settings, which is what I did.

Is the SuperMID accurate on really short trips like the one that I took to the grocery store ? ( 2.5 miles )

I should add that I unplug the SuperMID when I leave the car.
When I drive the car, I plug the cable in which sets everything back to zero.
All the parameters stay the same since they are in memory, but I get new data just for the trip that I take.

Perhaps this is what is messing up my data. ( ? )