Abstract: The invention, in one aspect, features a fuel and vehicle monitoring method. The method includes receiving, via a first processor, a first odometer value and a first fuel acquisition value for a vehicle at a first instance. The method also includes determining, with a second processor, whether the first odometer value satisfies a predetermined criterion. The method also includes forecasting a first future fuel economy value for the vehicle based on the first odometer value and the first fuel acquisition value and a plurality of previously received odometer values and fuel acquisition values if the predetermined criterion is satisfied, or the plurality of previously received odometer values and fuel acquisition values if the predetermined criterion is not satisfied.