Anyone tried these in a forth gen max? I know most people use lazer Plats or copper, I was reading about these on the NGK website and thought they sounded interesting. Also I couldnt find info on the lifespan of these

TIA

Hitman

 

If you are not boosted get coppers. I have (had) iridiums for a short time.

 

your best bet is still coppers, if you look on ebay, you can get them for ~$1.25 each.

 

I bought plats on ebay for $25, up to this point I've used coppers.

 

im running iridiums at the moment, i've been running these for about 6K miles now, i did notice a slight decrease in performance with the iridiums, but not enough to buy another set of plugs, i dont recommend iridiums unless your using nitrous or FI

 

I use NGK Double plats, but iridium plats were on the car from the dealer. I've heard NEVER use anything less than platnums for the max. That's what I've heard...

 

Copper!

 

I intend to replace my OEM platinum plugs with OEM platinum plugs. No coppers for me.

 

im using the ngk plats and its not that bad, i actually notice an increase in gas mileage.

 

After having Bosch +4 and not being very happy (no electrode after 15000 miles) I put in NGK iridiums. So far so good.