What are the main reasons for warming up the car in winter?

[Sienna]

The reason for warming up the car is that after the vehicle has been parked for a period of time, the engine oil inside the engine flows back into the oil pan at the lower part of the engine. Therefore, when the engine is first started, the upper part of the engine is in a state without oil and lacks lubrication. It takes about 30 seconds after starting for the oil pump to deliver oil to the engine's pistons, connecting rods, crankshaft, and other components. When the vehicle starts, the idle lubrication has not yet been fully supplied, making this the period when wear is most likely to occur. Here are the correct methods for warming up the car: After starting the engine, wait for 30 seconds to one minute before driving, but avoid driving at high speeds during this time. Maintain a low speed with the engine speed not exceeding 3000-3500 RPM, generally keeping it around 2000 RPM. Otherwise, the wear on the engine and transmission may become irreversible. Once the engine temperature rises to the normal operating temperature (which usually takes about 3 to 5 minutes), you can resume normal driving.