Has anyone used these? I recently bought a 2004 TSX (Auto w/Nav) that has 191k miles and am going to replace the current plugs. I plan to go with either the OE type NGK laser iridium or the NGK Ruthenium HX plugs. If anyone has used the Ruthenium HX, did you notice any difference?
As some may know in the UK there is almost nothing readily available for the CL9. Its a feckin' pain.
I see Bosch in the USA list platinum 4 plugs. I used to use these in all my other cars but they dont list them in the european or Australasian catalogues.
Anyone used (part number...