Rx8 plug upgrade!? DONT!!
Rx8 plug upgrade!? DONT!!
Short answer is Don't!! The OEM plugs really are the best plugs for our engine. The only exception to this is if you go Forced induction, you may need a different plug to deal with the different conditions in the engine. The plug's life is largely based on how dirty our engines burn, so getting a different plug for "longer life" makes no difference.