Is it necessary to warm up the car before starting?
2 Answers
It is necessary to warm up the car before starting. The reasons for warming up are: 1. The engine requires lubrication during operation, and the lubricating effect of engine oil is better when it reaches a certain temperature; 2. Gasoline or other fuels can fully atomize and burn completely at appropriate temperatures. The correct sequence for starting the car: 1. Turn the key to the ON position; 2. Press the foot brake and shift the gear from P to N; 3. Release the foot brake and turn the ignition key to the ignition position to start the engine; 4. Press the foot brake, release the handbrake, and shift the gear from N to D; 5. Slowly release the foot brake, add some throttle, and the car will start moving forward.
I've been studying automotive technology, and most modern vehicles don't require prolonged idling to warm up after starting. In the carburetor era, preheating was indeed necessary to prevent engine stalling and wear, but today's electronic fuel injection systems automatically adjust the air-fuel mixture. Idling to warm up actually increases fuel consumption and emissions. The correct approach is to start the engine, wait 30 to 60 seconds for oil circulation, then drive gently at low speed for a few minutes – this helps the engine warm up faster while reducing wear. In extremely cold conditions like sub-zero temperatures, you can wait slightly longer but no more than two minutes, as excessive idling may actually increase engine wear. Following this daily driving practice protects your car and is environmentally friendly – don't be misled by outdated notions.