I am a Mazda mx6 collector, I have had 10 of these cars. I recently got my wife a 98 Accord. Doing a tune up, my inclination is to put in NGK's, I use them in my Mazda. Wondering if these cars will benefit from a Platinum, Double Platinum, or Iridium, or just go with the standard copper core NGK's?

 

I think the spec plug is NGK platinum. Not sure there's much benefit to double or iridium. Copper plugs are probably OK but less lifespan. Honda was motivated to advertise "no tune-ups for xxx miles" or some such thing.

 

I've got a 97, 99, and 2000 Accords here, and I use NGK iridium plugs in all 3. I get them thru Rock Auto to save a few bucks (brings the price down to that of platinums from the zone). I've had no issues with them.

 

I put platinum's in them, car is running great!