When are you suppose to change your spark plugs?

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Oct 5, 2009 | 01:26 PM
  #1  
30k or 60k?
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Oct 5, 2009 | 01:29 PM
  #2  
I don't know the HR change mileage but with platinum plugs, the change is more like 90k. But doing it at 60 or 75k would be a prudent move anyway.
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