Review on NGK 94124 ILKAR7L11 Laser Iridium Spark Plug 4-Pack: Reliable Performance at its Finest by Samuel Naidu

I was looking for spark plugs as the dealer wanted to charge me $270 for replacing the spark plug and treating the fuel system. It sounded expensive to me. It was a great price, $40 for a box of 4. I also bought the outlet mentioned on the other poster as I didn't have the exact size. I went to YouTube to find out how to access it. It's very easy to pull the engine cover straight up to see it. I have replaced them all and when I pulled out the used plugs (90k miles) they have the same model number so this is an exact replacement. I connected one candle after the other. Once everything was assembled I started the engine and it worked fine. I also put a bottle of Gumout Regane in the fuel tank (well, and the liquid in it) and filled it up. So my service cost me $47 and I saved over $200! I immediately noticed that I have more power, accelerate better and more smoothly and the engine seems to shift more easily and run more smoothly overall. Didn't realize Mazda recommended a replacement at 70k, my previous Honda wasn't up to 100k.