Synthetic (Royal Purple) is OK for us!!!

Good info however I think alot of the info they give you is trying to make their oil "the same"basis as all synthetic oils which is not true..

I have never used RP in any of my cars but I have customers, clients AND friends who have used it in piston /rotary engines AND in trans/diffs and I have seen a fair share of trannys fail do to this oil


LIKE THIS

If this was a problem with synthetic motor oils in general, then all internal combustion engines using a ‘synthetic’ would experience increased deposits on internal surfaces. The opposite is actually the norm.


NO piston engines combustion chamber is designed like a rotary, apex seals may be a similar design as rings but act differently and take abuse and "build up" differently

IMO it sounds like the RP guys really dont have any experience with the internal workings on a rotary engine..





I also still stand behind oil that is MADE to be used in rotaries

ELF/Total
Eneos
Idementsu (yes...made by Total)