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France, Paris
1 Level
745 Review
45 Karma

Review on Autolite XP5364 Iridium Spark Plug by Josue Zepeda

Revainrating 4 out of 5

Stick Denso or NGK

I bought these to replace the stock plugs on my Mazda 3 2009 2.3L. They looked the same size as stock ones and although I didn't have CELs the engine seemed to stall at times, throttle response was worse and fuel economy was worse than worn out stock spark plugs. I bought some Denso spark plugs instead and now the engine runs very smoothly and the difference in performance is very noticeable. Gasoline consumption has also increased. I have used Autolite spark plugs on many cars in the past with no problems so I bought them at first but my Mazda just didn't like them.

Pros
  • Replacement Parts
Cons
  • No paint needed