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Shifting Advice
Submitted by Matthew on Friday, December 21, 2007 - 5:04am

OK got my Christmas gift early and having a ball. The RX-8 is really a great machine. The dealer made me a deal on a base sport model with a 6 speed manual transmission. It met all my WANTS in that it was basic and I love it (no tickets yet). In any case I have read about the Gas Mialage and am trying to figure out how and when to shift a vehical that redlines at 8500 to 9000 RPM.
I grew up with manual transmissions and understand the need to compensate between High RPMs and Gas Miliage but am also being told that if I do not "wind it up" it is actually bad for the engine?
OK anyone got some reccomendations as to what RPM levels to shift at (consider it a flat road so inclines are understood). I think two conditions:
1) More Miles per Gallon?
2) More Smiles per Mile?
Matthew (not afiliated with the dealership)

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December 24, 2007 - 10:24am
After 104 weeks of logging milage, I find no significant difference
in having fun and driving conservatively, so have fun. While it's
good to rev the engine frequently, that doesn't mean you should
red line it all the time, I get it up there close about once a day.
I usually shift around 4 to 6K. I like to keep the rpms around 3.5K
while cruising. I never rev high until the engine is warmed up.
If anyone cares the average for the logged 104 weeks was 14.87 mpg.
This is roughly 90% city milage. When looking at the logs you can
easily tell the weeks I hit the highway where I come in around 19 mpg.
I have hit 23.59 once on a trip from Allentown, PA to Rochester NY;
averaged 21.4 on the return trip. I have never been able to get close
to 24 again. My answer to you is have fun but don't go nuts!
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shifting advice reply to FRANCISP
December 28, 2007 - 4:02am
Thanks man that was just what I needed to hear. I am driving in the manner you have described and will take your advice I WILL HAVE FUN.
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December 28, 2007 - 2:32pm

The above advice was just a guideline,
you drive the way you feel comfortable.

The important word there is "significant".
You can improve your milage
by shifting earlier but it's no fun;
I only seemed to save aound .5 to 1 mpg.

My favorite gear is 3rd; I merge onto the
highway in this gear and shift
right into 6th when I hit 65 mph.
The neat thing about 3rd gear is: if you
take the rpms and divide by 100,
that's your speed.
Example: 5K rpms = 50 mph. Pulling onto the
highway even up to 7K rpms is 70 mph.

There are only two gears (1st and 2nd)
that you can redline legally.

There's one on-ramp in Allentown that is my favorite.
(Tilghman St. West onto 309 South) There's a stop sign
before you merge; what's neat is you get to
go 0 to 55 (the flow of traffic travels @ around 65 mph)
from a stop and do it completely legally.
There's where I frequently hear the buzzer.

So enjoy your RX-8, that's what it's for.
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