What are the disadvantages of revving the engine in P gear while stationary in a new car?
3 Answers
The disadvantages of revving the engine in P gear while stationary in a new car are: it wastes fuel and instantly increases the load on the engine connecting rods and crankshaft, which can affect the internal components of the engine. Therefore, it is recommended that owners avoid revving the engine in P gear while stationary. If the engine oil has not been changed for a long time, revving the engine in P gear can also accelerate engine wear. The car's gear positions include: 1. P gear is the parking gear, also known as the starting gear; 2. R gear is the reverse gear; 3. N gear is the neutral gear; 4. D gear is the drive gear, also known as the forward gear; 5. L gear is the low-speed gear; 6. S gear is the sport mode; 7. OD gear is the overdrive gear.
I was also curious about the sensation of revving the engine in Park (P) mode when I got my new car, but later learned from a mechanic that it causes significant damage. In P mode, the engine's power is locked by the transmission, converting energy into heat buildup inside, especially harmful for a new engine still in the break-in period. Microscopic burrs on parts need smoothing, and high-RPM no-load operation increases friction and accelerates wear, potentially damaging cylinder walls or transmission bearings prematurely. Additionally, engine temperature spikes beyond normal operating limits, risking coolant shortages or oil leaks from seals. I tried it myself for a few minutes—fuel consumption skyrocketed, the engine roared deafeningly, and neighbors came to complain. Long-term, this habit degrades new car performance and doubles maintenance costs. Gently pressing the accelerator after startup is far more economical and practical.
I'm the type of car owner who cherishes every penny and can't stand any waste. Revving the engine in Park mode with a new car is purely burning money – high engine RPMs without actual propulsion force, gasoline wasted for nothing, with fuel consumption in just a few minutes comparable to driving several kilometers. Doing this during the break-in period may cause early engine wear, potentially shortening its lifespan by over 50%, and repair bills will come knocking sooner or later. It's also terrible for the environment, emitting more concentrated exhaust fumes that pollute the air. I've done the math – revving the engine just once a month can add over a hundred yuan to fuel costs. That money would be better spent maintaining tires or upgrading the AC. Regular checks of the fuel system and electrical circuits can prevent issues; revving the engine is practically asking for trouble.
