Which fuel to use? Unless your car is turbocharged or otherwise boosted, 1979-1985 RX-7 rotary engines run just fine on 87-octane. In fact it is the recommended fuel for normally-aspirated rotaries. But if yours is turbo’d, use only high-octane fuel to reduce the possibility of detonation, which can destroy a rotary (or piston) engine.

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Rotor Head