A poorly tuned engine can increase fuel consumption by up to 50%.
Driving at 90 kilometers an hour rather than 100 can reduce fuel consumption by 10%.
Under inflated tires can increase fuel consumption by 5%.
Avoid unnecessary steering wheel movement since each side ward movement of the tire causes fuel-consuming drag.
Shift properly. If you have a manual transmission, shifting into high gear as soon as possible without straining the engine reduces drag and uses less fuel.
Smooth, gradual acceleration increases mileage; rapid starts waste gas. Try to maintain a steady rate of speed and take advantage of timed traffic lights.
Avoid unnecessary braking.
Maintain a steady speed.
Take advantage of rolling resistance rather than heavy braking to help slow you down. This deceleration technique is one of the best for fuel saving method.