Spark Plug

So many spark plug choices in the market, are they as good as the ads said ? My answer is, Yes !
However they are must be properly used and spec's matched to manufacture recommendation. You might read the Spark Plug in Wikipedia website http://en.wikipedia.org/wiki/Spark_plug

I dont want to talk about how to read the condition of your vehicle's spark plugs because probably its a common thing, but is it necessary to replace oem grade spark plug with aftermarket highly design, precisely manufactured built with the best material (such as iridium, gold, etc...)

Using the best aftermarket spark plug ? why not ?... but you must know what you will achieve with spark plug of your choice.
For example, plug with splited head wont have splited sparks like the pictures the printed on the box, why ? because electric only looking for less resitance path.
Another example, exotic material for spark plug's head, they claimed for bigger spark, yes it would, but it wont go like you got independent high discharge ignition system... it might better from the oem product as far as it got better material and better longevity.
As long as your ignition system is an OEM product you will not get bigger spark (i mean the "big" big).
Be smart for your choices, another product with HALO type head claimed they will produce the best overall achivement, hmmmm nope, i dont think so, that thick circle electrode head above the center electrode will restrict the combustion process both before ignition and after, air and gas will have difficulty passing into gap between catode and anode (side and center electrode).


Consult with your trusted workshop or dealership for the best choices for your needs. If you insist for using aftermarket, try to talk to private workshop.