Thanks for the note Phil. I was actually at the seminar and heard the advice first hand. After David's description of how the cam followers work on the 5.0 I can absolutely appreciate why clean oil is so important. Suffice to say that I will be changing my oil annually from now on as I will never hit 6,000 miles in a single 12 month period.
I hope you enjoyed the seminar as much as I did. It was also great meeting some of the other owners.
Thanks again for the note, much appreciated.