Originally Posted by
SrWilliams
Stan:
Thanks for the quick reply---Good gosh, I had no idea that these XFs are only supposed to be tuned up every 100,000 miles---GOOD Gracious, glad I posted this thread
I put new plugs in mine at 50000 miles and about 6 years old. I'm glad I did as they were partially frozen in place, hard to remove. The plug tips were good though.