Sorry to bump this thread again, but I'd like to be absolutely clear before purchasing new spark plugs. I did some research - prices range from $12 to $120 for the things!
Is there really any major difference between plugs with vast price ranges? For instance, I'm looking at this one, which is $17, shipping included:
https://www.sparkplugs.com/product.aspx?zpid=8668
And this one:
https://www.autozone.com/external-en...15247_721420_0
Which comes to about $77!
I suppose my confusion lies in knowing what TYPE of spark plug I should buy, and why some of them are markedly more expensive. Are some materials better, or even mandatory for my vehicle, or is most of it just markup?
I read up on iridium and copper plugs, but really don't know the benefit of either, or whether one or the other is essential for my system.
I'd really like to
understand the logic behind it's physics/chemistry of the material benefits, if possible. That what I'll have less silly little questions for y'all.
I have a 2010 328i Sedan (E90), btw.
Lastly, forgive my ignorance - I have ton to learn.