Cruising regularly at 4000 rpm

[ermax]

How does the car feel sluggish when cruising? I agree with Decep. Why spin high revs for literally no reason other than to put extra wear on the engine and burn extra fuel. I run 6th at 50 even. If I anticipate the need to accelerate I will run a lower gear but not if I’m cruising for 15mins at a time. A big part of why the auto guys get better MPG is because the auto isn’t a dummy cruising at 35mph turning 4500rpm.

[Jordanwolf]

Originally Posted by ermax

How does the car feel sluggish when cruising? I agree with Decep. Why spin high revs for literally no reason other than to put extra wear on the engine and burn extra fuel. I run 6th at 50 even. If I anticipate the need to accelerate I will run a lower gear but not if I’m cruising for 15mins at a time. A big part of why the auto guys get better MPG is because the auto isn’t a dummy cruising at 35mph turning 4500rpm.

Gotta agree with this key statement here, "How does the car feel sluggish when cruising", that really just don't make sense lol. You cruising, not mashing the gas pedal.

[humfrz]

Originally Posted by Jordanwolf

Gotta agree with this key statement here, "How does the car feel sluggish when cruising", that really just don't make sense lol. You cruising, not mashing the gas pedal.

By golly, another rational statement by ol Jordanwolf .......

I reckon his Friday evening sessions with his shrink are paying off ......

humfrz

[Decep]

I guess now we know how some people get 30 mpg and others barely crack 20. lol

[TommyW]

Originally Posted by ermax

Why spin high revs for literally no reason other than to put extra wear on the engine and burn extra fuel. A big part of why the auto guys get better MPG is because the auto isn’t a dummy cruising at 35mph turning 4500rpm.

THIS

Again......

[new2subaru]

Originally Posted by Decep

That's fine, you're just wasting gas. Cruising implies a constant velocity no? If im getting up to speed and people are going too slow i'll stay in 4th or 5th for a while sometimes.

That's the beauty and fun of a manual transmission

It's my weekend toy. I'm not concerned about gas mileage.

Why can't you cruise at 4k RPM?

As I stated earlier, I think the car feels better, sounds better and drives better at 4K RPM.


To those who posted after, I drive an AT in manual at all times lol

[humfrz]

Originally Posted by new2subaru

It's my weekend toy. I'm not concerned about gas mileage.

Why can't you cruise at 4k RPM?

As I stated earlier, I think the car feels better, sounds better and drives better at 4K RPM.


To those who posted after, I drive an AT in manual at all times lol

Now, new2subaru , I'll bet that when you were a kid, you put two playing cards on the spokes of your bicycle ........right .....??




humfrz

[PetrolioBenzina]

If someone could explain how "extra wear" occurs at highway speeds in the middle of the rev band I would be most grateful.

[StraightOuttaCanadaEh]

Originally Posted by PetrolioBenzina

If someone could explain how "extra wear" occurs at highway speeds in the middle of the rev band I would be most grateful.

at 4000 rpm your engine is spinning faster than at 2000 rpm, hence the extra wear from going faster vs going slower. More heat, more friction, more wear, no? That'd be my guess

[humfrz]

Originally Posted by PetrolioBenzina

If someone could explain how "extra wear" occurs at highway speeds in the middle of the rev band I would be most grateful.

Would you buy ..... extra wear per mile, for a car driven at an engine speed of 4,000 rpm vs. 2,000 rpm ......??


humfrz

[ermax]

Originally Posted by StraightOuttaCanadaEh

at 4000 rpm your engine is spinning faster than at 2000 rpm, hence the extra wear from going faster vs going slower. More heat, more friction, more wear, no? That'd be my guess

Exactly. It’s really very simple. If you’re in top gear at high speeds then you can’t avoid the high revs. I’m just pointing out that 4500 at just 35mph while “cruising” is just unnecessary wear.

[new2subaru]

Originally Posted by humfrz

Now, new2subaru , I'll bet that when you were a kid, you put two playing cards on the spokes of your bicycle ........right .....??




humfrz

Just 2?

[Vic4uf]

Originally Posted by humfrz

Now, new2subaru , I'll bet that when you were a kid, you put two playing cards on the spokes of your bicycle ........right .....??




humfrz

A smashed soda can worked even better

[Tcoat]

Originally Posted by StraightOuttaCanadaEh

at 4000 rpm your engine is spinning faster than at 2000 rpm, hence the extra wear from going faster vs going slower. More heat, more friction, more wear, no? That'd be my guess

Nope. Although that would seem logical it doesn't work that way. As revs increase so does lubrication and cooling. Your engine makes up for the change and for all intents and purposes it still is at the same levels as long as you are within the engineered operating range. Yes some things will "wear" faster through the extra fuel flow required but this difference would be very small. Yes if you are driving for a long period at red line or are rapidly changing revs you are adding wear since it is outside of the designed specs for cruising.
If anything cruising at too low of revs (there was somebody here that swore cruising at 1,000 whenever possible was best) can be harder on an engine than 4,000 since it would lug and lose oil pressure every time you tried to accelerate.