Abstract: A method of determining an amount of fuel wasted by a vehicle due to sub-optimal performance of at least one component of the vehicle includes receiving information about operation of the vehicle from at least one sensor positioned on the vehicle, categorizing, with a processor, a fuel use by the vehicle as a normal fuel use or a wasted fuel use due to the at least one component performing at a sub-optimal level by comparing the received information to expected information from the at least one sensor when the vehicle is operating at optimal performance, and determining, with the processor, the amount of fuel wasted due to the at least one component operating at the sub-optimal level based on categorized fuel use.