Do cars drive warm air and waste oil in winter?

1. When you turn off the fan and turn on the outside circulation (red) to turn on the warm air, it doesn't cost oil, but it is an environmentally friendly practice. Because the heat of warm air is the extra work made during the engine running, if the warm air is not turned on, this part of energy will be distributed to the atmosphere through the cooling system such as water tank and radiator with the circulation of antifreeze. Why not turn on the blower and just turn the red and blue switch for adjusting the temperature to the red side, and there will be warm air blowing out slowly?

In fact, if the warm air is turned on when the car is cold, the warm air will not be obtained and the warm time will be prolonged. Therefore, generally, the warm air switch should not be turned on before the water temperature comes up, and the red and blue switch for adjusting the temperature should be turned to the blue side, thus turning off the warm water switch. When the water temperature is normal, turn the red and blue switch to the red side and turn on the blower.

although the blower is not turned on, if the ventilation system is in external circulation, because the vehicle moves forward, the external air is blown into the warm air tank box through the external circulation valve, and the hot air is brought into the vehicle, so you will feel the warm air blowing out slowly. If it is changed to internal circulation, this phenomenon will not occur.

As long as the red and blue switch for adjusting the temperature is turned to the red side, even if the blower is not turned on, the coolant has already circulated in the heating system, which is true.

in order to keep the water temperature of the engine normal, once the water temperature exceeds the standard, the electronic fan will start to help the water tank dissipate heat. After the water temperature is normal, the electronic fan will stop working, and so on, so as to keep the water temperature normal. If the warm air switch is turned on, the coolant will flow into the warm air tank, which can help the coolant dissipate heat and reduce the frequency of the electronic fan switch, which is beneficial to vehicles, and there is no saying that it costs oil.

2. When the temperature is too low, turning on the warm air will consume more oil! Because when the temperature is too low, even if the coolant circulation is not turned on and the fan is not started, the heat generated by the engine will be quickly dissipated, so the engine must increase the amount of gasoline combustion to ensure the best working temperature. If the warm air is turned on at this time, it will only prompt the engine to further increase the amount of gasoline combustion.

In order to keep the temperature in winter, most engines are in a small cycle state; When you turn on the warm air, the cold air in the car quickly flows over the surface of the exchanger, which is actually to add an efficient radiator to the cooling circulation system of the engine! Especially when you are circulating outside, its powerful cooling effect can be imagined. The computer will instruct to increase the fuel injection amount and change the ignition advance angle to maintain the necessary working temperature. Therefore, it is best not to use heating when the water temperature of the car is not normal.

3. When the air conditioner is turned on, the fan and compressor are working, it will definitely cost oil. Because the power consumption of the air conditioner is higher when heating than when cooling, it will cost more oil than turning on the air conditioner in summer.