Hi there, before anything I'm going to say that I'm brand new to the rotary engine community and appreciate any help that's out here!
So I recently bought a 2009 Mazda RX8 R3 after doing tons of research and reading the forums a lot.
I understand the car warm up and how you should never rev the car until it's fully warmed up and short shift while it warms up.
So I was wondering if I do like a 5-10 min drive with short shifting around 2000 to 3000 rpm from friends house to my house and turn the engine off, would that be bad for the engine?
Obviously, I know that the carbon builds up if you don't redline it regularly, but say it was at the end of the day and you visited the friends house for few hours and you decided to go home so you drove it for 5 min home with short shifting.
Was wondering if this would cause problems on the engine??
Thanks a lot! I know this might be a really stupid question, but I found bunch of threads about warming up time, but nothing like this scenario...

 

Only need to short shift until the car is at operating temperature. Roughly 2-3 minutes of driving it under 4000 rpm will accomplish this. No, it won’t damage the engine at all to drive at low rpm, but you do want to take it up to redline once in a while to clear carbon buildup in the engine. The Renesis was designed to rev high and it likes it so don’t be afraid to give it hell once in a while.

 

People overthink this. Drive it like a normal car except give it a workout here and there. It's not a car to sit in traffic 5 days a week.

If it's the dead of winter, maybe don't start and stop it without a few minutes of run time, but if it gives you trouble in normal use, that's probably a sign something needs attention.

 

I would say anything above 2500 RPM on flat ground is fine. Below that, you are lugging the engine a bit.

Carbon buildup gets a bit more complex than that... Honestly, I don't think there is a way to really avoid it on a street car just due to the way rotary engines work and you won't get to that temperature when engines self-clean on the street(you might be able to on a track). That said, it's a good way to give the intake system some exercise and rotaries aren't that fun at lower RPM.

2~3 minutes might be able to warm up the coolant, but I would think oil takes a bit longer to warm up. Wait until the oil is warm before you get on the throttle.