What are the reasons for difficult car starting in winter?

[Cassandra]

Car starting difficulties in winter are caused by: 1. High viscosity and poor fluidity of lubricating oil, which increases the rotational resistance of the engine crankshaft, reduces starting speed, and slows down gas flow velocity in the intake pipe; 2. Reduced battery output power due to increased electrolyte viscosity, decreased penetration capability, and heightened resistance in low temperatures; 3. Increased mixture density leading to greater resistance between electrodes. Winter car starting precautions: 1. Turn on electrical equipment like headlights and radios only after the engine is running; 2. Turn off power-consuming electrical devices before shutting down the engine; 3. Wait 30 seconds before attempting a second start if the first attempt fails; 4. Avoid high-speed driving immediately after starting; allow the vehicle sufficient warm-up time.