Hi and welcome.
OK what ever you are going for, check allways the OIL! Use mineralic oil only on your rotary. They are also some synthetic oils but them have to meet many criterions, like low ash and low chalk etc..... so using mineralic is more secure way.
Change your oil and filter every 3.000 miles or less.
Change your coolant every year.
Upgrade your radiator and keep your engine cool at any price!
..... and you will be realy happy with your RX-7.