When the car calls for the copper...use the copper. Search the posts here (and archives) for platinum plugs. You will see a plethora of responses supporting this.
I had to get my Cu plugs from NAPA, since all the other auto places (Auto-Zone, PepBoys, etc) only carried the platinum replacements.
- John
"Would you say I had a plethora of pinatas, Pedro?"
"Oh Yes, El Guapo"
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