Pulled the factory autolites out of a 2010 Ford 4.0L SOHC, 120Kish KMs, and those suckers put up full resistance to the very last thread.
Each one was dry and corroded. I'm used to cracking the seal and fingering them out, not wratcheting them hard to the bitter end.
Each plug was corroded and rusty on the threads.
Conclusion: garbage alloy, reactive finish. Yes, made by Fram, and yes replaced with another set of Mexican Autoliltes unfortunately.
Each one was dry and corroded. I'm used to cracking the seal and fingering them out, not wratcheting them hard to the bitter end.
Each plug was corroded and rusty on the threads.
Conclusion: garbage alloy, reactive finish. Yes, made by Fram, and yes replaced with another set of Mexican Autoliltes unfortunately.