Fuel efficiency: Better fuel consumption can also be accomplished by finding shorter routes or routes that are more fuel-efficient. It is also important to perform regular maintenance on vehicles within a fleet to improve fuel efficiency including- watching your air filter since when an air filter is clogged, it negatively impacts a vehicle’s fuel efficiency by 10%, checking your tires since properly inflated tires can improve gas mileage by around 3.3% and by using the manufacturer recommended grade of motor oil for the vehicles in your fleet, gas mileage will improve by 1 to 2%.