Driving a car with low tyre pressure increases rolling resistance and decreases the mileage. Inflating the tyres a little more is likely to give you a better mileage.
It is important to short-shift and change gears at the right time to save fuel and get better mileage.
Although opening windows is beneficial when the car is running at a lower speed, it is better to use air conditioning at a higher speed for good mileage.
One can also keep the car's mileage in check by sending the car to the company's workshop for timely maintenance.
Revving of engine excessively leads to more consumption of fuel which gives less mileage to the car.