NGK Iridium spark plugs

[tgolds1]

hi, i was going to buy some NGK iridium spark plugs today but fund out they are nearly 30 bucks each as opposed to 4 bucks for the normal ones. are they worth it or should i just stick with the normal ones??

 

[Mk III the HSV]

I bought a set about 6 months ago, and there is no noticeable difference. I found that the acceleration a little smoother, but probably due to the condition of the previous plugs. The best advantage of the Iridium plugs is they are supposed to last for about 100,000km. So depending on how often you change your plugs normally, there's not much of a saving on $$$. Keep your receipt in a safe place too.

 

[Mark]

but myth that they are better. ok basically heat range is the same, gap is the same. conductivity is the same. everything is the same as the normal ngk's the only difference is they last like 5 times as long. but they also cost 5 times asmuch. so instead of changing ur plugs 5 times u only have to do it once! so its 1 and a half or the other

 

[jazza21]

Me too!

Sorry to dig up an old(ish) thread...

I have been thinking of putting some of these plugs in, not for better performance but better economy etc.

Anyone have any experience with them, or other brands?

There's a handy site with some info about Iridium plugs http://www.spark-plugs.co.uk/pages/technical/iridium_spark_plugs.htm

 

[Wombat]

I'm just glad our VS Ecotec can use normal plugs...who cares if they don't last as long as Platinum or Iridium plugs?
My sons '90 twin-cam 4-AGE engines Corolla Seca REQUIRES that you use those plugs...did he get a shock when he bought a set and it cost him $120 for four plugs!!! I know a guy with a sporty Nissan of some description (Gazelle I think) which has a "twin spark" motor, so he has to buy EIGHT of the bastards when he gets new plugs... :b:

At the price they are, you'd want them to last "100,000 kilometers", as claimed...