I thought I would share this with my Titan brethren. I had the oil and rear diff. fluid changed today. I'm from the old school and I get rid of factory oil at 1000 miles. The dealer did the oil change (first one is free). I went with Mobil 1. I did check the oil level prior to the change and it was where it should be, with the factory oil looking like honey. Mileage is 1133. The rear diff. was a different story. (MIleage at this point is 1177). I did this job myself. I got an old paint can and pulled both the fill and drain plugs. This oil was black, with a thick blob of "metal fuzz" on the drain plug. I cleaned the drain plug, applied a fresh bead of Permatex thread sealant, installed and torqued to 20 ft.-lbs. Then filled with about 2.25 quarts of Mobil 1 75w-140 gear lube. Cleaned the fill plug, applied Permatex thread sealant and torqued to 25 ft.-lbs. I was pleased to see the engine oil looking well, but the rear diff. oil was something to behold. My point here is to check your rear diffs. Hope this helps.

I have also always made the first oil change at about
1000 miles. The 3 Chevys I had used a magnetic drain plug
on the engine. At the first oil change there is alot of
metal particles (looks like powder) on the plug. I never
went to the trouble of cutting open the filter, but with
that much on the plug there must be alot in the filter.

Its amazing that its not as easy a sell as it should be. I have asked a lot of people if they would like to service the rear diff on there trucks, they almost always say no, it doesnt need it..Glad to see someone is actually trying to take care of there truck!