Spark plug Denso or OEM Subaru

Use NGK and if you can’t find them then go Denso. The only 2 plug brands I would put in a Honda.

My 2010 RX350 with the same V6 has 170k on it and still gets me 24 MPG - Denso factory plugs are life, prove me wrong.

NGK OEM equivalents or Denso IK22 for a slight bump in performance.

I’m running Denso plugs in my car…no issues to report.

I’ll stick with NGK and Denso.

I bought the absolute cheapest plugs available ($1.50/plug), and they are branded "Denso Toyota Iridium" - I assume fakes, but my magnifying glass does seem to show an iridium tip, and they work great.

I did Denso 3297 from RockAuto. They work great.

Bought some Denso 3450 Irdium plugs online. After reading about counterfits. I decided to test mine.

All are gapped .43 for the OEM spec for a 2014 Nissan Xterra. I measured the Irdium electrode tip which is 0.7mm and appears blue

I tried one of the economy plugs on my 02 Accord. Ended up having to chuck it and buy a Denso.

I tried Denso once. I took Denso’s out and replaced them with Denso’s. They ran for 500 miles and quit.