1. Make sure your tire pressure is right
Just as cycling with soft tires is heavier, driving with tires that are too soft costs more fuel. So make sure your tires have the right pressure. Usually the correct number of bars is in the fuel cap or in the door on the driver’s side.
2. Ride with as little weight as possible
The heavier the car, the more fuel you use. So make sure your car is as empty as possible and avoid using a roof box if possible; it increases the resistance. It is also advisable not to fill your tank completely. Suppose your tank has a volume of 50 liters, then it makes a big difference to only fill it halfway.