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Thank you for the replies everyone. I've been doing some research on rotaries and am starting to understand them better. RX8 oil injector diagram There are some concerns that the angled injectors don't provide adequate lubrication to the center of the seals, and that Mazda initially set the...

Mazda initially recommended conventional oil, but it's not completely cut and dry. They also make a full synthetic specifically for this engine, but it's only available in Japan as far as I can tell.

Sorry if I wasn't 100% clear. I use a very small amount of premix as additional insurance, but I'm asking for advice on the actual engine oil. The US manual recommends 5w-20 and the international manuals recommend 5w-30. But I want to choose a clean oil since carbon buildup is a common problem...

Hello, the subject of this post might seem weird at first, but I recently bought an RX8 which has different oil needs than most cars. It injects and burns a small amount of oil by design. So the main priority is a low-ash oil that will burn cleanly with minimal carbon buildup. I'm thinking...