Originally Posted by SignOfZeta
I see these two paragraphs posted all over the Internet, which appear to be Bosch'* take on the matter:
For what it'* worth, I believe GM calls for iridium plugs in the L36. Many members (including myself) have no problem with coppers. Seems to have something to do with platinum itself.
There are the facts; draw your own conclusions.
I've used Champion Double Platinum plugs in my L27 before. Ran those for about 80k miles with absolutely no problems and perfect performance. Those weren't Bosch plugs though.
Originally Posted by Human
That would stand to reason. I know GM specifies iridium plugs for the Northstar. If I recall correctly, the stock AC plugs for the Northstar are re-branded Denso Iridiums.
With the Northstars, I wouldn't have it any other way. The rear plugs on the GXP are a bit involved to get to from what I've heard.
Originally Posted by sseidriver97
like said i have em in my truck idk how a 3800 likes them..only one way to find out
A 3800 will not like them. I've tried it, many people have tried it, and its a bad idea. Save yourself the work and trip to the store and just get a good set of ACDelco, Champion, or Autolite plugs.
2005 Pontiac Bonneville GXP - For Sale ----- 1995 Buick Regal GS(X) - L67 madness
2000 Buick Regal GSE - Stock...for now
----- 1987 Jaguar XJ-* V12 - 12>8