SuperMID calibration - need advice
 

Can I calibrate my SuperMID without filling up my tank all the way or knowing the exact amount of fuel that is in the tank ?

I would think not.

My understanding is that I must first get an accurate estimate of my MPG so that I can input the baseline figures.
This would mean filling the tank all the way, driving for hundreds of miles and then dividing the miles traveled by the gallons used to fill the tank back to full.

right ?

Any you all say " That's so stupid I'm not even going to reply to that. What a moron. "

Agreed. Stupid question.

In other words , what I am asking is whether or not the data will be flawed on the SuperMID if I input data that is slightly off due to not knowing the EXACT amount of fuel used to fill the tank.
Sometimes the gas pump will shut off before the tank is truly full. This could mean a flawed reading when you go to calculate the MPG.
Also, the manual says that I have a 11.9 gallon tank, yet I only seem to be able to fill up to 10 gallons. I fill up when my reading drops to around a 1/16th of an inch to 1/8" below the 'E' mark.
Is there really that much fuel still left in the tank ? ( almost two gallons )
I don't want to run the car empty to find out, but I wonder how large that the tank really is, since that is a very large variable to consider in finding the cars MPG.

Sorry, I never even saw this question. You can do it, but it might not be exactly right, might take a few times of tuning, but you'll be closer, and the comparative numbers will still be there.