Hey guys. After posting my final numbers on last tank, I decided to leave everything as is except for the fuel change. So no tire press. increase. To do a true comparo had to keep all the same. I don't know if my station is using the "winter fuel" yet or not. I will find out though. This tank is doing a little less than last tank I am currently at 46.6 MPG @ 1/4 tank. Don't know if this has anything to do with super/reg or not.