I have officially hit 3300 miles since installing the UG!!!

I found out when the oil change alarm came on (I didn't even know it was set up)!
Anyway, 3300 miles later, I am finally calibrating it properly. Tonight I calibrated the distance. I don't have any mile markers nearby, so I had to use Google for distances, which of course, has some error built in. My trip was 4.2 miles, and I calibrated it for 4.225, just to give a little buffer. I did it 3 times, so hopefully it will work out.
I just got a fill-up today, but I forgot to hit the up button to reset it. Dratz!

So at my next fill up sometime next week, I will add in the amount of fuel used (pumped) into the 'calibrate mpg/fuel' menu? Or should I wait until the fill-up after that, when I reset the UG properly?