Well, I sent in some oil to be analyzed and it came back way better than I thought it would. I usually try to change my oil around 4,000 miles just to be sure and on the sample I ended up going a little over 6,000. Needless to say it was recommended to stretch it out to 7,500 and see what happens. After trying it out for myself I would have to recommend this to almost anyone that cares about their vehicle. It may not keep you from blowing up your motor, and may not save you any money on oil changes, but I am a big fan of knowing what is going on with my vehicles and this hit the spot. The silicon was only 3ppm so I guess the Donaldson intake is working.
(I wonder what it was with the old K&N I bought it with.)
I would post it up here if I could figure out how to take all of my personal info off of the PDF, but here is the "narrative".
AARON: We haven't seen a lot of diesel engines like this one come through here, but of the ones we've
seen, yours stands out as the best so far. Your metals are beating averages, hands down, so it looks like
your F350 is in great shape and has no problems to speak of. The TBN read 6.9, still lots of active additive
remaining. 1.0 is too low. The oil was in good shape physically, containing no moisture, fuel, or coolant.
Silicon was low at 3 ppm, showing no problems at the air filtration/induction system. Looks like a great
engine! Try 7500 miles on your next oil fill.
Anyhow, just sharing. It's almost like a new toy for the truck (but not quite). At least it's not a problem this time!