View single post by Tsquare

Posted: Thu Nov 23rd, 2017 09:24 am

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Tsquare

Joined: Fri Nov 10th, 2017

Location: Suwanee, Georgia USA

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I may be wrong, but I believe the SP413 is the standard copper that is nickel plated. They will last 20-25k miles. The platinum or iridium spark plugs can make the higher mileage.

My last set of FoMo copper plugs had opened up the gap to .075-.105" at 31k miles and I was getting misfires in 2 of the cylinders. The duel fire coil is hard on spark plugs.

____________________
Tony
NE ATL
'04 XLT regular cab 3.slo stepside
Semi retirement