I'm gonna test some stuff out tomorrow.
I will be going on a ~300 Mile trip, on the way there I will have to deal with DC Traffic, same on the way back, until like 60 miles from my house. There is a Shell gas station that I like to fuel up at (cheaper prices then at home haha).
When going from this gas station to my house, I once gotten 38 MPG, right after I side gapped and indexed my BKR6E-11's and just installed a PCV Oil Catch Can.