A reader asks: I own a Mazda RX-8 rotary sports car. At present, some of the engine oil is injected directly into the combustion chamber to lubricate the apex, corner and side seals. This plays havoc with the engine exhaust emissions. What I want to do is to mount a separate tank with AMSOIL 2-stroke oil and pump it into the oil injection system. I think it will do a better job keeping the engine internals clean than engine oil. Which AMSOIL 2-stroke oil would be suitable for this? 

Using 2-Stroke Oil In a Mazda RX- 8 Rotary Engine?

AMSOIL INTERCEPTOR Synthetic 2-Cycle Oil

Our answer: Keeping Mazda RENESIS engines running strong and deposit-free is a well-worn subject for the RX-8 crowd. Injecting or premixing two-stroke oil to reduce rotor seal wear is also a popular topic with performance-oriented RX-8 owners. AMSOIL does not have an official opinion on using 2-stroke oil in Mazda rotary engines. But AMSOIL Technical Services does admit that this a relatively common practice.

Apparently, the best result is attained by using AMSOIL Interceptor Synthetic 2-Stroke Oil mixed at a ratio of 100:1 with the fuel. There are also aftermarket two-stroke injector pump/reservoir kits for the RX-8 engine that feed oil at about 100:1.

Regardless of the delivery method chosen, AMSOIL Interceptor would be the best choice. Interceptor’s high detergent content fights deposit formation. It is also a top-tier product for wear protection in 2-stroke engines. Given its all-star attributes, it would be the best option for this unorthodox function.

AMSOIL has published technical service bulletins stating that their synthetic motor oils are compatible with RX-8 RENESIS rotary engines.