[Shop-talk] Spark plugs in regular cars

[Wayne]

Karl Vacek wrote:
> Since plain old OEM plugs seem to hold up so well nowadays that's my usual
> choice.  Is there any other advantage to platinums besides life ?

Platinums, etc last longer but do not perform any better.  On my 
4-cylinder Nissans, they were trivial to get to.  So I preferred to by 
plain ones (NGK for < $2.00/ea) and replace them more frequently.  If 
labor is an issue, I'd get the fancy ones.

> Is there anything new in plugs that's worthwhile ?  I saw some
> double-side-electrode plugs at one of the chain parts stores the other day
> (don't remember the brand).  They looked like aviation massive-electrode

Some opinons and wisdom from the Nissan guys:
http://www.se-r.net/engine/platinum_copper_ngk.html
http://www.se-r.net/engine/ignition.html
http://www.se-r.net/engine/specialty_spark_plugs.html

I'm a big fan of NGK.  They seem to have an unusual ability to just run 
at the correct heat, and are very tolerant of different driving styles 
and conditions.

> The cars - 1999 Ford Mustang Cobra with a DOHC 4.6 L, and 2005 Yukon with a
> 6.0 L

I'm sure there are Mustang sites out there with info on what works well. 
  Dunno about GMC.

   -Wayne