I got a new set put in some NGK’s.
Yeah, NGK's are great. Get the best you think you can afford.
I like NGK's iridium spark plugs personally
NGK FR6AHX-S 94279
NGK Laser iridium. Buy from a real distributor like Rock Auto.
I went with NGK plugs and coil packs at about 95k miles on my 2.5. I'm about 40k miles later and. It's still running great.
The proper champion plug is the "QL77JC4" gapped at .030".
Also check the spark plugs, sometimes people are cheap and buy autolites instead of NGK. Cheap plugs from previous owner give me a headache.
I had plugs from Amazon ngk and I had a wicked misfire couple days after. Somehow the ceramic broke off.
Please use original plugs for the replacements. Just yanked out aftermarket NGK platinums because of a misfire. For some reason, Mazda and aftermarket plugs in my experience always resulted in a misfire.
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