OIL:)

[Mux213]

Ah finally, someone bringing up mineral oil

Kristian which oil do you run then? (weight, brand)

There have been many discussion on car forums I hang out on. On the RX7 pages synthetics are near taboo unless you go premix. Problem here has to do with the injection of oil into the combustion chamber and synthetic oils burning differently which is not good for your rotary engine (yes my piston brothers, you hear that right, injection of oil INTO the combustion chamber!)

For piston engines however the general concensus is that synthetic oils are better BUT an engine that has seen mineral oil all its life shouldn't suddenly switch to synthetic. Something about the mineral oil resedue comming off and glogging your oil lines and some other stories about synthetic oils eating your gaskets. And then there are the stories about tolerence issues due to synthetic oils being less thick. In which respect these stories are to be believed or not...... There is so much misinformation around

That said, you also have to realize that most synthetic oils in the stores are actually really half synthetics.

I still have to hear from the previous owner what he ran. If he ran synthetic in my car I will probably stick with it, if there would have been any damage, its done already. But my gut sais to stick with a high quality mineral oil for any 80s engine.