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Which Spark Plugs Are Best, Aftermarket or OEM?

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Old 09-11-2011, 02:21 AM
BigBadBob BigBadBob is offline
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Which Spark Plugs Are Best, Aftermarket or OEM?

I had 2 Coil Over Plugs (COP) that were replaced by a mechanic several months ago. It was Cop #1 and #6. Now it looks that #7 needs to be replaced. My mechanice suggested that i just replace all the spark plugs. Currently my Expedition has approximately 89,800 miles. Should I go with Motorcraft or is there an aftermarket brand that some of you prefer for better performance?
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Old 09-14-2011, 11:47 AM
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berry1234 berry1234 is offline
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oem are good
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Old 09-14-2011, 07:48 PM
BigBadBob BigBadBob is offline
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Thanks for replying. Yeah, I did some research here and looked at some older threads related to spark plugs. It looks like OEM is the way to go. In fact, I already had them replaced yesterday by a local mechanic. This guys knows his stuff. It took him 2 hours to complete the job. He only charged me $100 to replace them, inlcuding the #7 ignition coil that went bad. Let me tell you guys, this made a huge improvement, I feel as if I gained 20 horsepower by simply changing the plugs! I can't believe the engine just feels smoother at idle. My wife was suprised as well. It feels like a brand new car. I got the Motorcraft plugs at O'Reilly's for $7.99 each. If you guys are considering changing the plugs, definitely go with OEM.
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Old 09-14-2011, 07:48 PM
 
 
 
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