[MidwestCarGuy]

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?

 

[Litespeed08]

They look very interesting. I can't wait until I see others experience using them in various climates/ weather conditions/ driving conditions as well as their longetivity. And they are just a little more costly than the iridums. Thanks for the mention.

 

[MidwestCarGuy]

Alright... I'll take one for the team. Will replace this weekend.

 

[MidwestCarGuy]

Well, I have installed the Ruthenium HX plugs and my car (2004 TSX auto 191k miles) seems to idle quite a bit smoother. Whether that smoother idle is due to new spark plugs altogether, or specifically the Ruthenium HX plugs, I'm not sure. However, I will mention the factory specced NGK laser iridium plugs I removed are in EXCELLENT condition. Long story short: I'll use the Ruthenium HX plugs in the future. (Doesn't hurt, might help... might as well.)