Spark plug NGK or OEM Mazda

I made the switch to NGK over a year ago, and haven't looked back. NGK are all made in Japan, and they're more consistent. Multi-electrode plugs hold too much heat around the center electrode, which increases the probability of detonation. Gapping the plugs is also much tougher to do. The grounds can also hold more garbage and shroud the spark.

That being said I ran Revo stage 1 and now APR stage 1 and in both cases I've had no issues running the NGK BKR7EIX plugs. I inspect them at a reasonable interval to make sure combustion looks good with them and it appears that they are doing just fine.

21K on my NGK's and no problem. Yes they were plug and play.

Never put those cheap ass Autolite plugs in... With that said, copper NGK plugs (brk6e) are great plugs...I was running the NGK -1 range cooler plugs (bkr7e) until the last GIAC update...and was pleasant pleased with the quality of the plugs...especially for $1.50 a piece!

within the past six months, off the top of my head, i had the following done at tyrolsport : timing belt water pump thermostat oil cooler and housing all new coolant hoses.. thats right.. i did it just cause.. i have the reciepts. valve cover gasket cam tensioner gasket ngk pfr6q's see where this is going?

i felt the same hesitation with my car. i did a scan and got some cylinder misfire faults so i changed my spark plugs to the NGK 1 heat range colder and i havent felt that hesitation since.

I used the NGK BRK6E V-power plugs, and from what I understand those are highly recommended, and I did switch the coilpacks from cyl 1&2. it's weird because I had many misfires before the CEL was thrown.

I know I use the cheap copper NGK B8ES plugs. Who cares if I have to replace them every oil change. For $1.79 who cares

Apparently these are good for my race car but might not be good for street application.

I've found that the NGK plugs that Canadian Tire has sucks....