Quote Originally Posted by miko101130 View Post
the only difference in specs would probably would be the heat range of plugs siguro... bawat model ng engine kasi ng vehicle meh specific heat range...

if the first 3 grooves ng thread is blacked, its ok, anything less than or more that (less than 2 grooves/ mroe than 3 grooves blacked) eh detrimental sa life and performance ng plugs...

ito probably and sinasabi na out of specs that eventually will lead to failure...
True... Tama ka sir.