I'm using Torque Pro on my truck. Yesterday, before a 100 mile trip, I "discovered" a selection for "Long Term MPG". It showed a reading of 16.08 MPG. I "assumed" that the ECU tracks the fuel mileage over the life of the vehicle and stores that number, because I have averaged about 22 MPG since I bought the truck used with about 31K on the odometer. So, I added that gauge before the trip. After I finished the trip (which I averaged 21 MPG) the Long Term MPG was now reading 14.83...WTF? So can someone with more knowledge about Torque Pro educate me as to the meaning of Long Term MPG??? Thanks in advance!