How to calculate car fuel consumption

Amount of fuel consumed/mileage = fuel consumption per kilometer.

For example, the fuel tank capacity of your car is 50 liters. When the fuel gauge light comes on, there is usually less than 10 liters left. If you have run 500 kilometers at this time, your fuel consumption per kilometer will be 40 liters. Liter/500 kilometers = 0.08 liters/km, and the fuel consumption per 100 kilometers is 8 liters. By refueling three times in this way, you can calculate a more accurate fuel consumption. Of course, the odometer must be cleared after each refueling, so that the number of kilometers traveled is accurate.

Generally, the fuel consumption of driving in the city is relatively high, because the displacement of the engine is certain, and the speed of the car is slow, because the gear of the car is relatively low.

If it is on the highway, the engine speed is the same as in the city (if you don’t believe it, you can look at the tachometer, it is basically between 1000 and 6000 rpm), but the gear is relatively different. Compared with height, the speed of the car is also faster. Therefore, the fuel consumption is also lower for the same distance.

However, although high gears are more fuel-efficient, it is still best to upshift or downshift as needed.

If you upshift too early, because the engine speed will slow down after the upshift, some oil will remain in the cylinder and cannot be fully burned, thus forming carbon deposits in the cylinder, which is harmful to the engine. There is no benefit.

As time goes by, fuel consumption will also increase. As for how many revolutions to upshift, it depends on different engines. Generally speaking, the larger the displacement, the higher the fuel consumption.

This is just a general statement. The exception depends on the piston. If the piston moves slowly, the fuel consumption may not be high.

For example, some new energy vehicles do not use gasoline as power but use electric energy when running at high speeds. The work of the piston decreases. Fuel consumption will also be relatively reduced.

In addition to the car's fuel consumption, in addition to the displacement size, the car's shape, weight, engine technology and other factors will also affect the fuel consumption.