Are most of you using NGK PFR7G-11S Platinum or NGK IFR7G-11KS Iridium spark plugs? Feedback from people who have used both appreciated.

 

18 views without a reply? Is no one using the OEM spark plugs?

 

Nope, no one is.

Have you tried NGK website or search the forums?

 

The iridium is not OEM to the S2000, the S2000 only came with the platinum plug, so there is only one oem NGK plug.

I actually prefer Iridium plugs as the center electrode is less prone to erosion compared to platinum, so it will wear down at a slower rate giving more consistent firing over the life of the plug. Some feel that the Iridium plug may be more prone to misfires, how I do not know, but that has been floated around.

Personally I run the NGK IX series of Iridium plug - NGK BKR7eix-11. I like the tapered ground electrode along with the iridium center electrode. I don't plan on leaving the plugs in my engine for 100k miles, I'll change them out much sooner than that. These plugs need to be gapped, but I know how to properly gap a plug. I also like to run a wider gap with my Okada coils.

Do a search you'll find lots of other opinions and info.

 

Yes, I've searched and read alot but I was looking for a platinum vs Iridium comparison. Thanks J!

 

https://www.s2ki.com/s2000/topic/548...d-maintenance/