After putting in 10.580 gallons (and driving a bit more before that to go a total of 436.9 miles on the tank), I was happy to learn that fuel economy for this tank was 41.29 miles per gallon!
So clearly it's because of the duct tape I installed on the lower front bumper. Or the psychological influence of the duct tape that caused me to drive extra-grannylike for this entire tank.
"IRREGARDLESS," I am pleased with this tank's outcome. Now the countdown begins until the next tank, as typically the tank after a great tank like this one is a severe letdown in the mid-30s for mpgs.
So for the year, my average fuel economy is now 37.97 mpg, a whole 0.10 mpg greater than my record set 65,000 miles ago in 2007. I'm averaging one tank every 9.33 days, which is my highest since 2008, the year I carpooled for several months with a coworker-who-must-not-be-named.