2008 F350. 6.4, 165,000 miles. Been runnign the same tune since 25,000 miles....change oil every 10,000 without question. Oil plug has alwasy been clean. This tiem the magnetic plug had some shavings on it.....first time it ever happened. I will keep running her and will pull the plug again in 2,000 miles and re-check. Anyone have any ideas? I know the spectrum if possibilities is broad, but any in put would be appreciated. Thanks!