Spark plug NGK or OEM BMW
Iridium will last longest. Grab them if you race or run the piss out of that bike but for all intents and purposes a plain old NGK is plenty adequate for everyday riding and then some.
Ngk have been pretty reliable motor craft is pretty good too but I've seen good life spans for both.
Very broadly, only use NGK, Denso, Bosch, or Champion.
according to my halfords e- receipt i last used cr8 iridium plugs, no complaints here.
NGK all day, compared to all others they’re just made better, I bought Bosch platinum for a VW and the OE came out were NGK, after 50k they were still visually a better manufactured plug. Example- the plating on the Bosch threads was rougher.
Over the last 16 years with my 8 gas engine VWs and Audis, the OEM or OEM equivalent (Bosch or NGK) at stock gap (unless chipped) have performed better and more consistent than any other I've tried.
The NGK's have been a solid go to for me and my little Pocket Ferrari for every day driving.
NGK run good for me
The only thing I noticed when it was extremely hot and humid my car was slow in accelerating.
Replaced the plugs -- BKR8EIX per the hstuning blog. I'm still getting the misfires...
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