Hello, FBI, Welcome to SXDF!
The dashboard mpg reading is generally +2 mpg higher than what you're actually getting, you'll have to calculate your actual mileage after a tankful to verify... But you're doing better than me, my 08 xD has never gotten over 32 mpg, and that was on a long highway trip. I average about 28 in regular daily driving, about 30% highway and 70% country roads...