Skip the auto shop - Our mechanics make house calls

Q: How bad is it for the car if when I accelerate i let it go to higher rpms like 4 or 5?

asked by on

I drive a manual 2005 honda accord with about 170,000 miles on it. How bad is it for the car if when I accelerate i let it go to the higher rpms, like 4 or 5. It goes to 8 with the red starting at 6 1/2

My car has 170000 miles.
My car has a manual transmission.

A: Hi there: On a four cylinder or small six ...

Hi there:

On a four cylinder or small six cylinder engine, accelerating the engine past 4,000 RPM on a consistent basis is not a good idea. The power band on lower gears tops out around the 4,500 to 5,000 RPM range. As a motor ages, the valve guides, cylinder head hardware and other close tolerance items begin to wear out. The higher they are "wound up" by bringing up the RPM past the power band can cause these components to break. Try to shift the car between 3,500 to 4,000 on a normal basis to extend your engine’s life.

Was this answer helpful?

A: Revving the engine to 4,000 or 5,000 RPMs w...

Revving the engine to 4,000 or 5,000 RPMs while accelerating won’t do any damage. That is well below the red line. Once you’ve accelerated to the desired speed, you’ll want to shift into the highest gear possibly that will still allow the engine to run smoothly without lugging. This will provide the best fuel mileage and prolong the life of the engine. Listening to the engine, you will be able to tell when it’s reached the "sweet spot" where it isn’t working to hard, but also isn’t lugging.

Was this answer helpful?

Need advice from certified mechanic? Get help now!

Over 1000 mechanics are ready to answer your question.
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

Ask a Mechanic
(100% Free)

Have a car question? Get free advice from our top-rated mechanics.

Ask A Mechanic
Over 10,000 questions answered!

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing

Get a quote

What others are asking

Q: Car won't start

Hi, thanks for writing in. The first thing to do is to check all the fuses that deal with the battery and the ignition system. There is a possibility while changing the terminals one or more of the fuses were...

Q: Engine light coming on

The diagnosis by another place may be correct, however, the Check Engine Light can go on for many reasons. If you'd like to have a second opinion on the Engine Light or have this service done for you, consider YourMechanic....

Q: A red light on the dashboard 2006 Honda Accord

Hello - this is not a problem. This is simply the security system indicating that it is "active", after locking your car, and is operating normally.

Related articles

How Do Power Car Windows Increase Passenger Safety?
Power windows are responsible for approximately 2,000 emergency room visits every year. When a power window closes, it exerts enough force to bruise or break bones, crush fingers, or restrict an airway. Though...
What Causes Hoses to Leak?
While the largest part of your engine is mechanical, hydraulics plays a significant role. You’ll find fluids at work in a number of different areas. Your car's fluids include: Engine oil Transmission...
How Long Does a Distributor O Ring Last?
The distributor is part of the ignition system in your vehicle and its purpose is to route high voltage from the ignition coil to the spark plug. The spark plug then...