Hey just wondering...

Is there more of a load on your engine at 7k RPM in fifth gear than 7k RPM in second gear? Im wondering because I constantly drive in higher RPMs in higher gears, and burning a fair share of oil. Im thinking less load = less oil burned.

 

I think "load" would actually be how much torque your engine is putting out.

So, look at the torque curve and figure it out from there. I don't see how gearing would make any difference, unless it causes you to change how much you're throttling the engine.

Going a constant speed, you would probably be throttling the engine more (giving it less gas) in 4th gear than in 5th. Therefore, the load on the engine would be less in 4th than in 5th......

I don't know if that helps at all.

 

I want to know based on the throttle being the same in each case.

People say if you are going like 10 MPH, and put it into fifth gear and floor it, you are putting a lot of load on your engine. So...(read question above)

 

To answer your question, Yes there is much more load on your engine at 7k in 5th gear than 7k in 2nd gear.

 

When you floor the engine at low rpms, like at 10mph in 5th gear, you're basically messing up the enigne. It's not that there's more load on it, though.

The way I understand it, at low rpms your oil pressure will be too low for the journal bearings to properly take up the loads applied to them, especially when you floor it. Also, journal bearings work better at higher rotating speeds. If you decrease the rpms and floor it, those bearings will take a beating.

I don't see how your engine would have more load on it in 5th than in 2nd gear. An engine can take up a certain maximum load at a certain rpm, or less than that if you throttle it.

Chances are though that you will be throttling it less in 5th than in 2nd, in which case, yes, the load will be higher in 5th.

 

Yeah...its called lugging the motor which is very bad. Puts a lot of load on the bearings..etc

 

Imagine you're riding a bike, and start going up a steep hill. Without changing speeds, is it easier to continue in a lower gear, pedaling quickly, or grunting up in your highest gear, pedaling slowly?

Gearing creates torque multiplication (or division, with overdrive gears) to the wheels. The higher the gear, the less torque benefit from gearing, and the more load on the engine.

 

if you drive around with VTEC engaged a lot you will burn oil pretty quickly.