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.

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?

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?
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details
  1. Home
  2. Questions
  3. How bad is it for the car if when I accelerate i let it go to higher rpms like 4 or 5?

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: Battery light on, temperature gauge maxed out, A/C system not working correctly

Hi, thanks for writing in. What you are describing happened to me personally a few weeks ago. It sounds like one (or both) of the accessory drive belt(s) that turn your alternator, water pump, and power steering pump is...

Q: What causes poor fuel usage, loss of power, rough idle, check engine light, and now a weird whistling noise? We have replaced the

Hi there. It is very possible that the ECU is the source of all of these issues. If you recently replaced the ECU, but it was not reset or programmed by a Saturn dealership, it's likely the reason for all...

Q: What do the active front head restraints do?

Active front head restraints are different from standard (inactive) head restraints. They’re designed to be a supplemental part of your safety network in the car, working with your seat belts and air bags to reduce the chance of serious injury....

Related articles

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...
P0240 OBD-II Trouble Code: Turbocharger Boost Sensor B Circuit Range/Performance
P0240 code definition Turbocharger Boost Sensor B Circuit Range/Performance What the P0240 code means P0240 is an OBD-II generic code triggered when the Engine Control Module (ECM) detects the intake boost...
How Much Does a Mechanic Make in Vermont?
Automotive technician jobs in Vermont have an average mechanic salary of $37k, with some mechanics earning a salary of $53k.