What are the consequences of leaving a car running overnight without turning it off?
2 Answers
Leaving a car running overnight without turning it off can result in the following consequences: 1. Increased engine internal wear: During idling, the oil pump operates at a lower speed, resulting in reduced oil pressure. This can lead to insufficient lubrication for moving parts such as bearings, causing wear and shortening the lifespan of pistons and connecting rods. 2. Carbon buildup: Prolonged idling increases the time it takes for the engine to reach normal operating temperature. Fuel injected behind the valves evaporates slowly, leading to carbon deposits. Additionally, frequent idling reduces the airflow into the engine, weakening the cleaning effect on carbon deposits and accelerating their formation.
I've experienced forgetting to turn off the car engine several times, and the fuel consumption overnight is truly heartbreaking. With the engine running continuously, it burns roughly several liters of fuel. Depending on the size of the fuel tank, this could mean an extra cost of several dozen to a hundred yuan. What's more troublesome is that prolonged engine operation can lead to overheating, potentially damaging components like pistons or valves, and repairs for these aren't cheap. Especially in summer or winter when the air conditioning is on, the compressor might also get damaged, adding to the repair costs. There's also a significant safety concern: if parked in a poorly ventilated garage, the accumulation of carbon monoxide from the exhaust could lead to poisoning, which would be truly regrettable. Developing a habit of checking the car before leaving can help avoid such troubles.
