Is Revving the Engine in Neutral Harmful to the Car?

[PrestonLee]

Revving the engine in neutral is harmful to the car. Prolonged revving significantly increases oil consumption because high temperatures can cause the oil to vaporize and enter the combustion chamber, leading to oil burning. Insufficient oil levels prevent the engine from being properly lubricated, creating a vicious cycle that damages the engine. The car throttle, also known as the 'air valve' or 'throttle valve,' is a control device that regulates engine power (thrust). In piston-type aircraft engines, the throttle controls the carburetor's throttle opening to regulate the cylinder's filling volume, thereby determining the engine's output power. The reasons for a heavy car throttle include: 1. Failure of the power assist component; 2. Obstruction or increased friction in the transmission part; 3. A dirty throttle causing insufficient air intake.