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Why is coasting in neutral not recommended?

3 Answers

DelCorey

07/30/25 12:37am

Hazards of coasting in neutral: 1. Coasting in neutral can generate excessive heat in the transmission, potentially causing damage. Whether it's a manual or automatic transmission, when coasting in neutral, the gears inside the transmission rotate at high speeds, instantly producing significant heat. Additionally, lubrication may become inadequate during neutral coasting, making this practice harmful to the transmission. 2. When coasting downhill in neutral, you lose engine braking and must rely solely on the brake system for deceleration. This can lead to brake system overheating and failure, creating a highly dangerous situation.

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MacStephen

08/15/25 5:33am

I've been driving for decades and know how scary coasting in neutral can be. Especially on mountain roads or steep downhill highways, if you shift to neutral, the engine braking is completely lost, leaving the entire burden of deceleration on the brake system. After a long descent, brake discs and pads can overheat, potentially leading to failure and loss of control. I've personally witnessed a fellow driver do this on a rainy day—they couldn't brake in time during a turn and crashed into a guardrail, suffering serious injuries. Modern cars are actually designed to be safer when coasting in gear, as the engine automatically adjusts to help control speed while also saving fuel. Developing the habit of coasting in gear ensures stable driving, rain or shine, on flat roads or slopes—one accident is already one too many.

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LaEmma

10/20/25 2:17am

I used to be very strict about fuel economy and initially thought coasting in neutral would save some gas, but I was wrong. Modern cars have electronically controlled fuel injection, and when coasting in gear at the right speed, the engine automatically cuts off fuel supply, consuming almost nothing. In neutral, the engine idles and burns fuel for no reason. On a long-distance test, I found that coasting in gear reduced fuel consumption to the minimum on the same slope, while neutral coasting increased it by 0.5 liters per 100 kilometers. Doing this long-term can also lead to engine carbon buildup, increasing maintenance costs, and poses higher safety risks with greater brake load. My advice is not to try to outsmart the system—coasting in gear is more economical, safer, and more eco-friendly.

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