Kurt Robertson Enterprises - Wankels' to Offenhausers'
Education is a wonderful thing. It can help you with your every day decisions.
Below is an effort to help educate you if you are a second owner who may have bought an RX8 with low compression and with the muriad of Band Aids, then this may be very interesting.
Band aid #1 STARTER SPEED
 Mazda has a TSB (Technical Service Bulletin) issued in 2006 in reference to the Starter for the 2004-On Mazda RX-8 w/MT.
"TSB#01-048/06  if the Starter Number on the Tag is "N3H1" (17917), the Starter needs to be
replaced. If the Starter Number on the Tag is "N3H1-A" or "N3Z1" (or Later - 17993),
the Starter does not need to be replaced. Cars with VIN #JM1FE173***150745 and below are affected. The result of the improved Starter is to crank the engine faster to help overcome a flooding / no start condition." 
Basically this new starter has 13 teeth instead of 11 and has a kw rating (power) of 2.0kw instead of 1.4kw.
The manufacturer feels that a starter is cost effective and redesign of the Renesis is not a option. This reminds me of the 1969-1973 top start engines with a gear reduction starter that was the size of a small golf cart motor! This is a procedure that sometimes works . . . . . .  for a  few months to a year
BAND AID # 2 SECONDARY IGNITION
Many RX8 motors will often have brand new coils, wires and plugs. This is in an effort to give the engine a perfect secondary ignition to help overcome any undesirable chamber  conditions. The factory coils can sometimes misfire as soon as 10K miles after replacement! This is a procedure that sometimes works . . . . . . . for up to a year
BAND AID #3 DECARBONIZING
If you can clean the chamber and maybe unstick (restore?) a side seal or corner seal then maybe that might buy some more time.
Now in the case of a tea toadler this might work. The common saying is a redline a day keeps the carbon away. But the average RX8 owner has more than blown the carbon out of her, in most cases they have worn the seals to the point of low compression. This is a procedure that sometimes works . . . . . . . for a few months
SOMETHING TO LOOK AT and CONSIDER!
A fresh modern day starter with used battery cables and a 650 cold cranking amp battery will run loaded between 150-190 RPM - which is not on this chart, update your entire system starter, and battery are the basics, this chart is from the RX8 Work Shop Manual .
The early mazda approved gage I have has this same chart on its' back side, but the KGF-CM2 goes from 5.0-7.0.
Still think your start up problem is unique to you?
                                          Zoom- Zoom -HMMM?
Website Builder provided by  Vistaprint