What Are the Consequences of Driving in Neutral?
2 Answers
Consequences of shifting into neutral while driving: 1. No fuel savings: When the engine speed exceeds 1200 RPM, the fuel injection system stops injecting fuel when the throttle is released. However, if shifted into neutral, the engine speed will inevitably drop below this baseline, causing the fuel injection system to resume fuel injection, which actually does not save fuel. 2. Reduced engine lifespan: During idle operation, the fuel concentration in the cylinders is relatively high, leading to carbon buildup, cylinder wear, and a shortened engine lifespan. 3. Loss of vehicle control: In emergency situations, the inability to promptly restore power can result in loss of vehicle control, posing safety risks. Moreover, most drivers cannot quickly shift into the correct gear based on actual conditions during emergencies. 4. Severe transmission damage: Driving an automatic transmission vehicle in neutral can directly cause severe transmission damage. Since the output end of an automatic transmission is directly connected to the drive wheels, and the lubrication system is linked to the engine, shifting into neutral at high speeds can lead to insufficient lubrication and subsequent burning of the transmission.
As a veteran truck driver with over a decade of experience, I've witnessed numerous accidents caused by coasting in neutral. When descending steep slopes in neutral, the engine doesn't assist with braking, putting all the strain on the brake pads, which can easily overheat and fail. It's even more dangerous in rain or snow, as the rear wheels are prone to skidding and fishtailing. In city traffic, coasting in neutral while following other vehicles leaves you unable to quickly shift gears and accelerate to avoid sudden hazards. I remember last year on the highway when we encountered a patch of fog—my apprentice happened to be coasting in neutral and nearly failed to avoid rear-ending the car ahead. The memory still sends chills down my spine. That's why I now keep it in second gear when going downhill, letting the engine help control the speed—it's the only way to feel secure.
