Spark Plugs

[GhostMercury]

Looks to do a bunch of work on the car on my week off next week. I'm wondering what spark plugs people prefer. Looking for the stock heat range being that all I really have is a SRI.

 

[DrWebster]

How many miles do you have on the car? Factory plugs are NGK Iridiums, which are good for 80k. Mazda didn't cheap out, they're very good quality.

 

[GhostMercury]

The o2 sensor crapped out so it's been running super crappy lately. I figured they could be replaced in my fixing this weekend. Don't know if the lean and rich conditions messed with them. I'd rather just replace them

 

[dmention7]

I would replace them with OEM NGK plugs like Colin said. From everything I have heard/read, they are very high quality.

 

[mndsm]

Yeah, the OEM's are the way to fly. I've heard mixed results with the Densos (which are IIRC, the only other option) but the NGK's are solid. No one offers a copper plug for the car yet, which is REALLY annoying to me, as rich as these run.

 

[cody23]

I need to replace my spark plugs and I'm looking to buy as soon as possible but I've got a problem with what brand to buy. I heard about NGK and that they're good however a bit expensive. How about denso spark plug? Anyone tried this? mndsm:why mixed results? Thanks guys!

 

[matt8478]

I have the denso one step colder plugs. LOve them. But the ngk are a good option too.