Spark plug Autolite or Denso

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

Had some Denso plugs in my '15 WRX (unaware to me) and the plug in cylinder 2 was fouled within 7k miles and caused a misfire. Turns out the shop that the previous owner took it to for the 60k-mile plug change decided to cheap out. I now have OEM plugs :D

Careful with Denso, back in MK7 days some complained that the plugs would shatter and cause engine damage.

Put autolites in my Durango, ran like junk nd put NGK in and better.