All this talk of oil changes and buying off Amazon, I gave it a try.
Ordered two (2) 5-quart jugs of oil ($27/each) of full synthetic Castrol Extended Performance motor oil and a Fram filter for $4. Placed order on Saturday. Box arrived yesterday. Started oil change around 11PM, finished around 11:25PM. Took longer to drain the oil out than I expected (at least 5 minutes). Wasn't a big deal, though, as I had 2 oil pans. used the other to remove the oil filter while the final bit of old oil drained out. Poured the used oil back into the empty jugs, cleaned things up and packed them up to drop off at Autozone on my lunch break. Not too shabby.
Truck took just over 5 quarts of oil. Took it for a test spin, sounds great. It was definitely time for an oil change, even though service record showed that oil was changed last in January at only 3,500 miles ago.
Based on driving around 600 miles per month average, technically shouldn't have to change the oil for another 2 years (Full synthetic guaranteed for 15,000 miles between oil changes). will probably check it in a year or so and see how the oil looks.