Spark Plugs?

The Bosch USA website does not have a recommended spark plug for our Mazdas. I've just changed mine to NGK Platinum ($2 more than the copper ones) and found the car to be a lot smoother. Check the NGK website as they have the recommended # for the spark plug.
 
I just recently changed mine to Bosch Platinum 4's. So, far I haven't seen anything that would seem like they didn't work. Everything seems ok.
 
Yeah, My friend tested out the difference between Plat 2's and Plat 4's for his race car and he said there isnt any difference at all. But a couple of my friends recommend NGK's cuz they have those on their car.
 
ya ngk is startin to become kind of big now. i just looked into some of my freinds 2004+ owner manuals n most of them says recommended ngk plugs.
 
alright thanks guys, i'll head up to my local performance shop and order some in the next week or so.
 
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