Some people like to run the synthetic in the diffs and such. I usually run coastal gl5 or if Im in a serious pinch supertech. They are cheap, meet the spec, and they are yellow metals safe.
10w40 from a decent brand is good. You can eek out a little extra mileage with a 5w30 high mileage oil. No idea why these motors are that sensitive to oil weights, never had anything else that was. In the wife's rig without her knowing which one is in there...she nets an extra mpg or two on average with the 5w30.
Mobil, valvoline, chevron, schaeffer, shell, pennzoil, exxon...all make a good product.
Im a little more partial to mobil super 5000 high mileage....but thats because I can get it cheap.