Spark plugs & wires
 

How often do you replace or need to replace them?

Also what spark plugs and wires do you get?

Plugs in a rotary take a beating. I replace them at about 15,000 - 20,000 miles. I just use the standard NKG's recommended for normal driving. Depending on what kind of plug wire you use, they probably last 50,000. I use Magnecore 8.5 mm and they have always worked fine for me.

i use the regular NGKs, and their plug wires, if u suffer from flooding once in a while, remove the plugs and clean them, i do this twice a month, due to N/As being rich in low rpms(wich i usualy stay in), which can cause hard starts(fouled plugs).
i replace my wires every time i replace my plugs, besides, wires are only $26(NGK).
i change both once a year(15k miles or not).