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Spark plugs???


SJDeVille

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I'm giving my Deville with about 99000 miles a minor tune up plugs , wires, filter's, any suggestions on what i should use or go ahead and just use orginal AC delco parts???? all suggestions welcome, thanks for any input in advanced.

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This topic has been discussed on many occasions. If you search you will see many opinions regarding plugs. It is the general consensus that ACDelco plugs are the best because they are tried and tested for GM. Aftermarket parts are not tested and can present problems if they don’t meet OEM specs. In fact, I remember someone (maybe bbobynski?) mentioned that on occasion aftermarket plugs could overheat because of improper heat range and actually cause catastrophic engine damage. I’m sure this is very rare but there have been incidents where this has occurred. You should buy either ACDelco platinum or double platinum plugs. Some say regular platinum is fine, while others go with double platinum.

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