should i change spark plugs?

[BYprodriver]

Originally Posted by JFP in PA

They are an excellent plug, just be sure to get the correct heat range.

JFP, any speculation why Bosch & NGK seem to be going away from 4 electrode plugs?

[JFP in PA]

Originally Posted by BYprodriver

JFP, any speculation why Bosch & NGK seem to be going away from 4 electrode plugs?

Simple: The Iridium's out perform and out last the multi electrode plugs

[BYprodriver]

Originally Posted by JFP in PA

Simple: The Iridium's out perform and out last the multi electrode plugs

I realize that but Bosch recently discontinued their Iridium 4 electrode plug for 986s & I couldn't find a NGK replacement either. My local supplier said Bosch recalled the plugs off their shelf.

[pjq]

Wow, today I just installed 6 new Bosch FGR 6 KQE plugs in my 2004 S 3.2L. Is there a problem with these plugs?

[JFP in PA]

Originally Posted by BYprodriver

I realize that but Bosch recently discontinued their Iridium 4 electrode plug for 986s & I couldn't find a NGK replacement either. My local supplier said Bosch recalled the plugs off their shelf.

I think you are referring to the Bosch "Platinum Ir Fusion" plug that is a hybrid of both Iridium and Platinum plug technologies. It uses Yttrium side electrodes and a Platinum and Iridium center electrode:



I had heard there had been problems with the side electrodes.

The Iridium's we use are single side electrode Denso's, and they have been working very well for us.

[mnc-i]

I have a 1999 Boxster and I change the plugs every 30,000 miles.
I do believe there is not a true need to change them that often, but I do it myself and plugs are cheap.
I use Bosch 4-electrode "Platinum Ir Fusion" #4503 plugs.
I get them from RockAuto for $6.16 per plug. The last time I purchased them from RockAuto I got a $24.00 rebate.
Based upon this thread "Should I Change Plugs?", I just ordered a new set. Unfortunately now RockAuto only sells them in packs of 8.
And the rebate is still available until 31 Dec 2013.
I see this as a win win situation.
Just my two cents.

MNC-I

[BYprodriver]

Originally Posted by JFP in PA

I think you are referring to the Bosch "Platinum Ir Fusion" plug that is a hybrid of both Iridium and Platinum plug technologies. It uses Yttrium side electrodes and a Platinum and Iridium center electrode:



I had heard there had been problems with the side electrodes.

The Iridium's we use are single side electrode Denso's, and they have been working very well for us.

Yes that's what I was referring to, Bosch 4503 I think. Looks like they changed the side electrodes.

[boxster]

Thanks for the info guys. I think i will continue to use denso iridium though. I will get them checked out at the next service