Do Small Cars Need to Warm Up in Winter?

[Yvonne]

Winter car warm-up is necessary; 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. Reasons for warming up the car in winter: Lack of lubrication: After the car has been parked for a long time, the engine oil inside the engine flows back into the oil pan at the bottom. Therefore, when starting the engine after a long period of inactivity (such as overnight), 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 circulate the oil to the parts of the engine that need lubrication the most, such as the pistons, connecting rods, and crankshaft. When driving immediately after starting the engine, as long as you don’t press the accelerator pedal hard for rapid acceleration and maintain low-speed operation, the effect is the same as idling. Low fuel supply temperature: Before the engine reaches its operating temperature (approximately between 90-110 degrees Celsius), the fuel supply system cannot effectively vaporize the gasoline completely due to the low temperature. When the gasoline is not vaporized and remains in a wet, liquid state, it is difficult to burn and start the engine. At this time, the choke valve comes into play, restricting some air from entering the cylinder to increase the gasoline/air mixture ratio and raising the engine speed to prevent stalling.