Quote:
Originally Posted by JimD
Mike Miller (writes a maintenance column for the Roundel) says the plugs from the dealer are different, even when they have the same part number, as the parts sold elsewhere. The problem with that theory is that would be fraudulent behavior if the manufacturers ever did that. Why would they risk it? I like Mike's column but I do not believe he is correct on this point. If the manufacturer really provided different parts to the dealer, they would just give them a different number.
I put in NGK spark plugs from Rock Auto about 30K miles ago. They work just fine. Miles per gallon is the same as before.
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Same here along with Delphi coils right after I bought the car to get it on my own schedule. I've only put about 3K mikes on it, but it's been running great.