Re: 2005 GC- Mileage, Plugs

Steve Richards wrote:
> Just checking in, the missus has the 3.7L and the specs say plugs every
30k. 
> She's really up in arms about the fuel prices. That's a topic for
another 
> day. Sure am glad I don't have a diesel!
> 
> She's getting 17-19 (80% hiway). I pulled the plugs (50K) and they are
the 
> original NGKs. We're the second owners and I am really surprised that
they 
> haven't been changed. Air filter is clean and we use 87octane.
> 
> Anyway, I am planning on replacing the plugs tomorrow with Bosch
Platinum 
> IIs. Pros/cons and your feedback would be appreciated.

As far as I'm concerned, there are NO "pros" to Bosch platinum plugs. 
The tiny center electrode is a perfect design... IF your goal is to 
completely negate the longer wear life of Platinum by forcing the arc to 
strike in exactly the same place every single time. And if you want to 
make sure that the metal electrode erodes down so that its below the 
face of the surrounding hard insulator, and therefore one little fleck 
of deposit can cause it to misfire.

If you want platinum plugs, buy a set of Autolites. They're 100 times 
better than the Bosch crap.