How long should a sedan be preheated?

[Erica]

Sedans only need about one minute of preheating. The reason for preheating is: After the car has been parked for a long time, the engine oil flows back to the oil pan at the bottom of the engine. When starting, the upper part of the engine lacks oil and lubrication. The purpose of preheating is to raise the temperature of the engine oil and improve its lubrication effect. The functions of preheating are: 1. Heating the antifreeze to improve the car's starting speed; 2. Maintaining the temperature of the engine block when the car is not in use, especially in low temperatures; 3. Preheating the engine oil to ensure it remains fluid for immediate circulation throughout the engine upon starting.