At what RPM can you start driving after warming up the car in winter?

[Matthew]

In winter, you can start driving after warming up the car when the RPM reaches 3000 to 3500. The method for warming up the car is: after starting the vehicle, let it idle for 2 to 3 minutes to allow the engine coolant temperature to reach normal operating levels, then you can drive. Not warming up the car can cause damage to the vehicle: it leads to engine wear, as the engine oil settles at the bottom when the engine is cold, leaving the internal parts in a state of dry friction. The benefits of warming up the car are: 1. After the car has been parked for a long time, the engine oil flows back into the oil pan, leaving the upper parts lacking lubrication; warming up the car provides lubrication. 2. When the engine has not reached its operating temperature, the fuel system cannot effectively vaporize gasoline completely due to the low temperature; warming up the car can improve efficiency. 3. It helps the transmission gear oil to lubricate the upper parts of the transmission.