I see all these guys talking about getting 15-17 around town MPGs on the org but my truck gets around 10.5. I drive conservatively for the most part and even with my 70% highway driving the dash says 13.5. I have a tonneau cover which i heard can save you 1-1.5 MPG which im scared to even take off now in fear of hitting single digit MPGs. I have stock wheel/tire setup and a turbo-back MBRP cool duals setup with no cat. I just had my truck in for oil change, dummy plugs and stc fitting and they reflashed it while it was there and now there's a HUGE lack of power all around and dropped 1-2 MPG. WTF is going on here? I just ordered a SCT X3 and Looney tune from vivian and it should be here tuesday but i see guys only seeing a 2-3 MPG gain. HELP!