I doubt it. The 2jz is like other piston engines and it shouldn't demand anything more special than the car next to you.
As for viscosity, I would go with what the manufacturer recommends, which should be a 5w-30. If you want to treat your car, you can use a synthetic. Some brands that are worth noting are Pennzoil Platinum, Amsoil, and Redline.
If you really want to get particular about oil, check out www.bobistheoilguy.com/forums - this place will teach you more than you ever wanted to know about oil/car maintenance.