MPG
From Torque Wiki
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Torque can use several sensors to calculate your vehicle MPG / Fuel efficiency
Due to the different sensors some vehicles use, the calculation may require information to be entered into the vehicle profile to be accurate in some cases.
There is also a newer 'alternate' MPG calculation that can be enabled in the OBD2 Adapter Settings, to enable it, tick the box labelled 'Enhanced MPG calculation'.