Don’t drive your car in a lower gear with high accelerating and in a higher gear at low speed because this is consuming higher fuel and causing effects on your vehicle. Change your gear as soon as possible while driving your vehicle without straining the engine too much.
Use the air conditioner in your vehicle only if you need it. If the weather is nice and you aren’t covered with much traffic, then roll your vehicle’s windows down and enjoy the air.
While driving vehicle at high speed on highways then you must need to keep the windows shut, Because when your vehicle’s windows are, open your vehicle becomes less aerodynamics and cause much pressure on engine which can increase fuel consumption.