Thanks guys for the sound advice. I feel pretty comfortable now that I'm not ruining my truck...If you want to ease your mind, collect a sample and send it to Blackstone. It doesn't cost much, less than the extra oil change would cost to do it every 5k, and after one sample you would have a good idea if it is wearing well or not.
If I were interested in having the oil tested, how would I go about doing so? Just speak to my dealer?