is this an actual number direct from an on board sensor or is it a calculated number based on weight and engine size etc, I have enhanced Mpg enabled and all the options correct as per the advice on MPG but still seems to be a high amount of fuel used?
I have 2 vehicles and 2 profiles, I accidently loaded wrong profile on one vehicle and my MPG was way OFF, but my vehicles get MPG from torque via O2 sensors, so if uses o2 for MPG then yes profile does make a huge difference.
Also remember winter fuel is still available and can cause 10-20% decrease in MPG.
As well if you have bigger tires than stock you can adjust as well if you find way off you can tweak in settings to get more accurate.