Half the "blown apex seals" RX-8s on Marketplace are healthy cars owned by someone who never learned the ritual. Rotary people know. That's why they keep quietly buying them for Civic money while everyone else repeats a forum post from 2009. Save this before you scroll past the next cheap one: 1. Four plugs, not two. Every chamber gets a leading and a trailing, and they do different jobs. One weak trailing plug feels exactly like a dying motor to someone who's only ever owned pistons. 2. Spark ENERGY is the spec, not spark presence. Coils on these are a consumable. They'll still fire on a tester and still be too soft to light a chamber that's moving away from the flame. Test them under load or just replace them. 3. The rear plugs are a 20-minute job that becomes four hours, one busted knuckle, and a trip to buy the swivel extension you swore you already owned. Budget the whole afternoon and stop lying to yourself. 4. Most "it won't start, must be the seals" cars are flooded. Cold ...