Re: 2005 GC- Mileage, Plugs

Alrighty, read lots of posts and I thank you all for the input. My buddy 
(Manager) at the local 'zone is a Mopar nut and sees it all...

He stated that he read an article or TSB somewhere that stated Chrysler
did 
not recommend anything other than the OE plugs, citing their belief was
that 
the Bosch platinum (and variants) caused pre-ignition. So, I went OE, 
although no NGKs were available, so in went Autolites. Funny thing is, 
'zone's system states gap at .044, underhood sticker says .040. Set them
all 
at 40 and took her for a spin to Laughlin and back. 75 miles, 20 mile 6% 
grade down into the valley and back up- 23.2!!!!! We have never gotten
that 
result before.

In brief, I'm stuck on the OE plugs, and just put Autolites in my 97 Ford 
460 motorhome chassis. Have yet to run a full tank through her...

Thanks all for your valuable insight!!!!

-- 

2008 Sonata SE- His
2005 Grand Cherokee-Hers

AZ home for sale near Laughlin, Las Vegas, BHC:

http://www.realtor.com/realestate/golden+valley-az-86413-1089865380

"Steve" <no@[EMAIL PROTECTED]
> wrote in message 
news:G_-dnb60OZ2z_9nVnZ2dnUVZ_vWdnZ2d@[EMAIL PROTECTED]
> 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.