Dexelia oils are the only oil recognised by Mazda for the use in there RX8. Any other oil could void the manufacturers warentee.

The only fully synthetic oil recommended for rotary engines.
Royal Purple's motor oils are API certified and will not void new car warranties. Royal Purple® recommends waiting until the manufacturer's first scheduled oil change or a minimum of 2,000 miles in new gasoline engines before using Royal Purple®. Allow 8,000 to 10,000 miles before use in diesel engines.
Environmentally Responsible: Royal Purple® Motor Oil extends oil drain intervals. Less oil is purchased and less oil is being disposed of It's good for your vehicle, and good for the environment!
Multi-Grade Oils: 5W20, 5W30, 10W30, 5W40, 10W40, 15W40, 20W50
Straight-Grade Oils: SAE 30, SAE 40, SAE 50
Royal Purple® Motor Oils are compatible with other mineral and synthetic motor oils.

Royal Purple produces a wide range of high performance lubricants for nearly every industrial application. Royal Purple's industry experts develop products that significantly outperform other synthetic or mineral-based oils in the laboratory and more importantly, in real world settings.

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