As per TED's request.
What spark plugs do you use? are you not experienced and still go of backwards Mazda OEM recommendations for your engine or have you used something else with great results?
Post and or argue away! open shit fight allowed
I do not use garbage Mazda oem recommendations, reasons are numerous but needless to say better results in every criteria can be achieved with different spark plug specifications.
My favorites are
Ghetto spec > NGK B*EGV
Mild ghetto spec > NGK B*EGP
Don Mega Spec > NGK R7420 *
* denotes various heat ranges.