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Is coasting in neutral or coasting in gear more fuel-efficient?

1 Answers

DiWyatt

07/29/25 5:58pm

Between coasting in neutral and coasting in gear, coasting in gear is more fuel-efficient. Coasting in neutral: This involves shifting into neutral and letting the car glide forward by inertia. It's important to note that coasting in neutral is only applicable to automatic transmissions; manual transmissions should never coast in neutral. When a manual transmission is in neutral while moving, the transmission is still operating, and the lack of lubrication can cause wear. Coasting in gear: The engine is between low-speed fuel cutoff and high-speed fuel cutoff. At this point, the onboard computer detects that the car is idling, but the speed is higher than the engine RPM, so the computer will stop the fuel supply to the engine. Precautions for using a car engine are as follows: 1. Avoid driving in neutral: The engine itself has a deceleration fuel cutoff function, and driving in neutral is not conducive to fuel economy. 2. Pay attention to observation when using the vehicle: If you find oil on the ground, determine whether there is an engine oil leak and communicate with the car dealership promptly to eliminate safety hazards. 3. Do not turn off the engine immediately after high-speed driving or climbing a hill: For cars equipped with turbochargers, let the engine idle for 10 minutes before shutting it off. Turbocharged cars accumulate carbon deposits several times faster than naturally aspirated cars. 4. If water is mixed into or absorbed by the brake fluid: Replace or carefully filter it promptly; otherwise, it may cause insufficient braking pressure, affecting braking performance.

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