Welcome to the diesel world. There's been lots of debate on oil. I don't have time to post on all the differences. There's been considerable debate lately on the current oil standard of CJ4. It's now believed the older standards of CI4/CI4+ is better. I'd recommend buying Napa Premium Performance Universal Fleet Plus. It's a CI4 oil made by Valvoline. Available 12qt to a box or by 5gal pail. The Classic Valvoline Premium Blue CI4+ is a slightly better oil that's not available yet. Napa sells rebadged Wix filters. You'll be ok with Wix, Baldwin and Fleetguard. At all costs avoid Fram. Napa also sells fuel filters for your truck. The current Fleetguard standard for your truck is 7micron filtration. I don't know the Wix micron rating currently sold by Napa. I buy my filters direct from Cummins Northwest in Renton. Another great source is
Dodge Cummins and Ford Power Stroke Diesel Truck Accessories - Geno's Garage.
Use a large freezer bag around the oil filter before removing. I've heard the factory oil filter is on unusually tight. I rarely spill a drop when changing oil. The oil plug torque setting is 40lb ft tq.
When changing the fuel I put a used heater hose over the fuel drain line. This extends the line to my waste container. No fuel to stain the driveway. Open the yellow valve. While it's draining do your oil change. Open the lid. Remove/install filter. Be sure to use new gasket. I also coat the new gasket with 30wt oil. Turn key on for two minutes. Turn off, turn on. By the 3rd time you turn the key on the canister should be full. Start truck.
Some of the 06's came with less than required ATF+4 in the transfer case.
Also, check the powersteering requirement. It's now ATF+4. Not powersteering fluid.