Originally Posted by hounddogg

NGK platinum iridium is the direct replacement for the plain NGKs.That is what I'll use.All it takes is a little anti seize lube on them to prevent seizing in the head.I'll run them 60k and pull one or two to check wear.If OK I'll run them 90k if I have the truck that long.The difference is in the metal used in the tip.The platinum iridium does not wear as fast so longer run time.

Originally Posted by hounddogg

Here is the NGK site.www.ngksparkplugs.com Plug number is plzfr5b13e2 with a .044 gap.There is also a tech assistance phone number etc.

Originally Posted by lasstss

This is interesting, the real reason platinum's are used is that the manufactures found another item that they dont have to replace (usually) under warranty. They also know that most people dont take car of their cars and run them on regular gas. Hence they are detuned. For performance plat plugs are just OK. The electrodes are small. Switching to a conventional correct heat range copper core plug usually make the throttle response snappier. Especially with injected cars. There is now way just a plug can screw up a warranty unless you put in a plug that is not the same spec and it whacks a piston/. A good set of conventional NGK's will work great. Of course if they are not made to fit, youre out of luck. Plugs should be changed anyway after 30k the engine will just run better. IMO

Originally Posted by hounddogg

Lots of new vehicles plug change is 100k. I've owned such.Have had plug's come out still OK gap wise and wear was minimal. Going to put platinums in my 09 at plug swap.