I've always been intrigued with Rotary engines (How the hell did Felix Wankel ever think up of something like this), so I thought id join up (Even though I own a WRX). So Hi https://www.nopistons.com/forums/pub...IR#>/smile.png



I actually have a question about motor oils used in Mazda Rotary engines, why is it you cannot use a fully synthetic motor oil in a Rotary engine, and is it really true that its not worth rebuilding a Rotary engine if its shot?

rotary engines burn a small amount of oil on purpose, to help lubricate the seals. synthetic oil turns nasty when it burns, not good for the engine.



the engine can be rebuilt, depending upon what got damaged determines what parts get replaced, and what gets re-used, same as a piston engine

...actually recent research shows that you CAN use synthetic and it's all a big myth that you can't. Pretty sure Racing Beat puts synthetic in all their engines and recommends it on their site. If you can't believe them...who do ya believe? Also, I think this is a repost...there's been a huge discussion about this on one of the 7 sites if not this one.

I am running Amsoil Synthetic 20W50 Racing oil in my car. I have taken out the oil injectors and use Pettits Protek premix.





You can run Synthetic in your rotary. Do a search abd you will find a whole thread on it. I think 9BASE3 started a thread a while back about it.

I run full synthetic in the "crankcase" and the gas...



A forum member and I just rebuild his 13b for $330....

i thought they say you cant use it was because mobil wsa the only company making synthetic and they had some disagreement or something like that.

Yeah i heard something like that.



I run mobil 1 in my modded FD. It did make the engine smoother, but synthetic opens up more leaks.

well for whatever the reason, when u get a flyer about your rx7 from the dealer that says "do not use synthetic oil", i dunno about you guys, but id go with what the maker of the car is telling me...

I run synthetic. Of course my ROTTEN PINEAPPLE is a piss-poor example! :(

20W-50 VALVOLINE VR RACING OIL

Well you know what, it doesn't matter. That is the bottom line. There are plenty of guys doing both without problems.

Oh no here goes the war on synth is evil no it's not!!



I use Castrol in the RX-7, use Valvoline 30 in VW's



Welcome aboard. I guess you can hang around even if you do own a Subaru. (He says, jabbing at UnqiueTII's WONDERFUL red DL Wagon that's SITTING in his FRONT DRIVE RIGHT NOW with the CV SHAFT half way on. *coughs*)



I want a WRX...

I run Michelob Ultra in mine. I have no problems whatsoever, except the ocassional burp....

BWAHAHAHA.. ROTTEN PINEAPPLLE>>>!! Thats Classic... Anyways.. there are opinions on both sides.. it all really depends on the owner preference..

Castrol GTX 20w50 for me.



I could use synthetics, but i really dont think it makes that big a deal anyways. As long as you replace your oil on a regular basis you should be fine.

bwahaha.. i run bud light in the stang.. lighter viscosity