Did you know the higher the RPM, the more fuel is burned? If you enjoy revving hard and taking off at speed, you may not realize its effect on your fuel mileage.
First, what is over-revving?
Over-revving occurs when the driver revs the engine beyond its recommended RPM range. RPM or Rotations Per Minute deals with how fast the engine operates.
Effects of Over Revving:
Nowadays, most truck engines are designed to be protected from over-revving. Though, this doesn’t mean there aren’t any effects from doing it.
One notable effect of over-revving is poor fuel efficiency. The faster an engine spins, the more fuel it uses, so allowing your truck to reach excessively high revs in any gear causes poor fuel efficiency. Trucks running at 1400 RPM will achieve the best fuel mileage.
How is Over Revving Measured in BT Scorecard?
BlueTree Metric Definition: Over Revving – Accelerated RPM
In the BlueTree Performance Scorecard, over-revving is measured by the percentage of time spent over the RPM target.
- 3% of the time: Good (Green)
- 6% of the time: Okay (Yellow)
- 12% of the time: Bad (Red)
RPM Target
- Anything lower than 1700 RPM – Green
- Anything higher than 1700 RPM- Yellow
- Reaching or higher than 1900 RPM – Red
How can I improve in the over-revving category?
If you notice that you place yellow or red in the over-revving category, here are some tips to help you achieve green:
- Avoid aggressive acceleration
- If driving a manual transmission car and realizing that you have under-shifted, that best way to avoid over-revving is to jam the clutch pedal in. When your clutch is depressed in a manual car it prevents the wheels from being connected to the engine. Make sure when you’re shifting gears your in the correct gear.
- Proper use of engine break – for Owner Operators only