Hey all, its about time to replace spark plugs in my "stg 2+" 05 Wrx ej205.
Las time I replaced them I used the tried n true Ngk Iridium Ix stock heat range plugs. I went to order them again, and noticed there are now Iridium Ix, laser Iridium, and Ruthenium options.
It seems Ngk is sayong their laser iridiums are "better" than their Iridium Ix, and their Ruthenium plugs are "better" than all...
Has anyone used these? Or are Ngk Iridium Ix still the "best" go-to plugs?