well ive noticed some slight pinging under light to moderate acceleration ONLY when the weather is warm. first noticed it a few days ago at mid afternoon,temp was in the upper 80's . never hear it in the mornings or at night. other than that my car runs strong, and doesnt overheat. 170k on original headgaskets. im thinking about switching over to autolite copper plugs, as i have heard and learned through research that they are more resistant to detonation when compared to the stock platinums which i am now running.what say you, the fine people of the SCCOA ?