Customer Reviews

NGK (4469) LFR5AIX-11 Iridium IX Spark Plug, Pack of 1

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I was looking to replace platinum plugs on my Infiniti after 95k miles. I tend to over analyze a lot of purchases and found plugs to be no different. I founds ones ranging in price from $1 to $15 each. In the end, i found some resources online that showed this plug to generate on average 2hp more than a baseline test. i cannot speak to the accuracy of that information, but can tell you from experience that switching plugs can have HP effects (I just can't verify anything about this particular plug without using a dyno).

The biggest and defensible difference is that gas milieage has increased. On my old plugs, over a 13,000 mile span i averaged 18.7 mpg. With these plugs over a 4,000 mile span i'm averaging 19.2 mpg. This is with no change in driving patterns. This is a 2.67% increase in mileage and with my annual driving i'm estimating that this translates into an annual fuel savings of ~$80. This fact by itself makes these plugs worth it.

one other added benefit is that my car seems to have smoother accleration from a dead stop. not more split second delay and very slight jerk.

of course all of these benefits could just be the fact that my old plugs were work and these are new and i would have seen the same results regardless what kind of plugs i got. i can only say that i'm happy with these particular ones.

Six of these NGK Iridium Platinum-tipped spark-plug will be needed at the 105,000-mile service for the 2002 Maxima (3.5L V6 Gas DOHC). Replacing the 2002-Maxima spark plugs is very laborious so having the dealer or your trusted car-mechanic do it for you makes sense. I recommend buying six of the NGK Iridium plugs from Amazon because otherwise, your mechanic will charge you the full list-price when they do the 105,000 mile service.

these plugs works really good from the time you install them you can fell the proformance in your car. got them for my nissan wingroad 03 japan import this is the second time am buying these plugs smart way to save fuel.....