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
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