I originally bought the car with the stage 2 93 oct map, but noticed some pinging when testing some WOT runs. I switched to the 91 oct map and have continued to use 93 oct fuel... the pinging has completely gone away, however, my gas milage has dropped to 16-18 MPG over the past 2-3 months I've been tracking it. I used to get 19-22 with the same exact driving habits and route.
Could the tune be effecting my results, or can I solely blame this on winter gas and cold weather?
2004 WRX, Cobb turboback and SF intake