Is it necessary to warm up the car after starting it?

[DiJuniper]

It is necessary to warm up the car after starting it, and the correct method to do so is: 1. Start the vehicle and keep the air conditioning turned off; 2. Let the engine idle for 30 seconds to 1 minute; 3. Begin driving slowly once the engine runs smoothly; 4. Once the engine coolant temperature gauge rises by 1 to 2 bars, you can drive normally and turn on the air conditioning. The reasons why a car needs to be warmed up are: 1. After the car has been parked for a long time, the engine oil flows back into the oil pan at the bottom of the engine; 2. Before the engine reaches its operating temperature, the fuel supply system cannot effectively vaporize the gasoline completely due to the lower temperature; 3. When parked, the gear oil flows to the lower part of the transmission, leaving the upper part of the transmission without lubrication when the car is cold.