28 miles to the gallon, WTF

Alright,
I think I hit the lottery or something. I ran a trip to Dallas and back with a MS6. 28MPG (27.6). Should I be doing any add ons or just leave it the way it is? Its a daily driver and I don't want to reset a computer or something and take it down to 22-24. Is 28 normal?

I am planning on: SRI(SURE, ordered) TIP, Cobb AP, DP and MAgnaflow exhust.

I hope you're also planning a set of fuel pump internals if you're running a DP.

28 highway is to be expected, especially if you were keeping it out of boost, stage one improved my mpg, Stage 2 did not, lol

This is what I have been looking for. Someone replied. I haven't the foggiest IDEA what I am about to do to this vehicle. DP/fuel pump internals noted. I am in the army and am using the guide of a soldier who knows some about cars and he said

"test pipe, AP and intake." also the motor mount from every post ever about the speed 6.

Why/what should I know about this fuel pump internal thingy, first off is it expensive? all the info is appreciated.

thanks all!!!