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Nov 30, 2007 | 07:29 AM

#121

Zrealsoon

Registered User

Joined: May 2006

Posts: 145

Likes: 0

From: Fort.Collins Colorado

Just a guess...

Quote:

Originally Posted by Master Shake

OK, here's one I never understood -- and this applies to multiple brands, not just the Z.

When you are at an RPM speed higher than idle and you put your car in neutral, why is the RPM slightly higher than when the car is in neutral, but at 0 speed?

Your engine still powers the power steering and alternator through the belts. At a higher speed, meaning not stopped: You car want's to keep
the engine at an RPM the can sustain normal operation of the other
components. Kinda like if you turn your steering wheel while sitting still...
The RPM spikes as the power steering sensor can tell a need for more
pressure so the engine revs up to turn the power steering pully more.

Quote:

Originally Posted by Master Shake

For example, driving at 40 MPH and put the car in neutral. My RPM is around 1K all the way until my speed is at 0 (or actually less than 5 MPH). At that point, the RPM returns to around 800.

Since modern cars no longer have a cooling fan driven by the motor, why does this happen?

Uhmmm

Nov 30, 2007 | 07:53 AM

#122

DouBLeJ16

Registered User

Joined: Jan 2004

Posts: 193

Likes: 0

From: Cape Coral, FL

Quote:

Originally Posted by zerohurst

I get about 20-22mpg when I shift early (3000-4000rpm). But when I shift between 4000-5000rmp it goes down to about 17-19mpg.

Exact same here.

Nov 30, 2007 | 11:29 AM

#123

VQZ33_Jake

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iTrader: (1)

Joined: Jul 2007

Posts: 1,160

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From: mpls, MN

use cruise control (if you have it). keep your rpms under 2800-3000. i avg. about 320-350 per tank.

Nov 30, 2007 | 02:17 PM

#124

elms350Z

Registered User

Joined: Apr 2005

Posts: 639

Likes: 0

From: San Diego

I do about 22 mpg which I'm ok with. I usually go with Shell gas and I shift between 2000-2500 because it makes a nice exhaust tone there =)

Nov 30, 2007 | 03:05 PM

#125

east1999bt

Registered User

Joined: Oct 2004

Posts: 1,055

Likes: 0

From: NJ

Quote:

Originally Posted by bboypuertoroc

Don't whine about it... you got a ****ing sports car. What the hell you expect, the mileage of a Prius?

I get ~240 out of my Evo, but I don't whine like a crybaby about it... it's to be expected.

I agree...

Try this - shift at 2000 rpm, drive 5mph below the speed limit and... might as well sell your car and get a honda civic instead!