OK...It's about time for me get some new sparks so I did a little shopping and researching. I got some pretty helpful info that I'm going to pass along for those who want it.

NGK Iridium IX = Iridium center electrode w/ standard ground; Life expectancy of a traditional spark plug; NGK's marketing gimmick!!!

NGK Iridium = Iridium center electrode w/ platinum ground; Life expectancy of 100,000 miles

NGK Double Plats (OE) = Platinum center electrode w/ platinum ground; Life expectancy of 60,000 miles

NGK only recommends the NGK Double Plats for our cars (unless you need a colder plug). NGK Iridium is better in terms of life expectancy but not worth the extra money. There are no true extra hp gains from the sparks. HP gains advertised is actually HP restored from power lost from old deteriorated sparks. This is true for all sparks!!!

Of course, we all already know the traditional coppers (at a fraction of the cost) work just as well as any of the above but only last 30,000 miles, right? Good!!!

The information was provided from the friendly NGK technicians themselves! Thanks!!!

 

Hey man, what's up?

You still in Auburn?

 

Yeah...I graduated a couple of years ago and got a job in Montgomery so I'm commuting back and forth. I thought I saw your Max here in Montgomery a while back.

 

Check your PMs....

 

thx.....

time for em to switch - a - roo to some new sparks

 

i got NGK iridiums($6) because they were twice cheaper than the plats($12).

 

You probably got the IX Iridium for that price.

NGK IX Iridium = Part# BKR***IX
NGK IRIDIUM = Part# IFR****

 

i got the latter one

 

NGK Coppers own them all!