When buying new cars and used cars, it is also important to compare the fuel economy of the cars as well as the prices. On our MPG comparison page you can choose 2 vehicles and compare all the features including gas mileage. To compare the vehicle, select the first vehicle from the plus button above. Then complete the process by selecting brand, series and year information, then engine type and vehicle version. Do the same for the second vehicle and compare. When comparing the fuel economy, particular attention must be paid to the luggage compartment volume, fuel tank and tire dimensions. These specifications can affect the mileage, weight and performance of the vehicle, as well as provide guidance on what needs can be met