Causes for lowered gas preformance?

[amalventano1 at tds.net (Allyn)]

It all boils down to convenience really.  Do you want longevity (platinum), or short term performance boost (copper).  I change
plugs often, so I naturally go copper.  The impact seems to taper off to platinum levels after 3000-5000 miles, and seems to level
off slightly below that.  I'm only speaking from 16v experience though.

hth
Al 

> -----Original Message-----
> From: Neptuno [mailto:neptunonc@yahoo.com] 
> Sent: Monday, December 18, 2006 11:10 AM
> To: Don Walter; roccit_53@scirocco.cs.uoguelph.ca
> Cc: scirocco-l@scirocco.org
> Subject: Re: Causes for lowered gas preformance?
> 
> What about spark plus. I have heard at least for the 1.7ltr 
> that I have (and maybe all 8v) To stick with the copper Bosch 
> plugs W7D IIRC. last time that I did a tune up I bougth the 
> platinum Bosch replacements (I think they may actually suck)
>    
>   When I went to the FLAPS yesterday they again had the 
> platinum ones. I refused to buy them. I am going to try and 
> find the plain old copper Bosch plugs.
>    
>   What says the list?
>    
>   Thx
>    
>   EL T
> 
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