Ford V-10 sparkplugs (SP 479 or AP 103)
I bought a old X with the 6.8 and wondered what's the best sparkplug to run. I seen Motorcraft SP 479 and Autolite AP 103. Any suggestions? I won't change them, I'll let the mechanic I use change t...
Forum Discussion
Before you do it, you'd better do some research on line about the blown out plug issue on the 2002 and earlier versions. There is a ton of info out there and it's not just a case of changing the plugs, there's a lot more to it. For sure Motorcraft but you might strip the threads taking them out plus there are special specs for installing the new ones.
