For those out there with stock trucks with minimal mods, what has been your experience with mpg?

I have been pleasantly surprised with my truck, which only has a 5” exhaust with a 30” twister, edge juice with attitude.

I have been trying the different levels and predominantly run on 3.

My in-town mileage with NV4500 in this truck is 16 mpg.

This is a C&C truck with a 12’ stake bed.

I believe the last weight I had on it was 9200 lbs or so.

I was lucky to get 9-10mpg before the exhaust and “tuner.”

I'm curious about what others see with and without mods and where I go from here.