Spark plug Denso or OEM Mazda

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.

I've always used the Denso SK20R11 plugs in mine and been pleased.

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 had EPC light/limp mode and P303 as well about a month ago on my '12 GLI (APR Stage 1+) at 102K miles that recently had a walnut blast and new Denso plugs at around 101K miles. Swapped coil packs as well and still P303 with EPC light/limp mode.

Skip them, they are junk and a waste of money.

Get a good single platinum plug like the Denso 4511.