Use any major brand name oil such as Castrol, Pennzoil, or Valvoline to name a few. The best everyday deals are the 5-quart jugs at Walmart. Our owner's manual states to use 5W20 or 5W30 for temps below 0. For temps above 0, you can use 5W20, 5W30, or 10W30 according to the manual. Some people like thinner oil, while some people like thicker oil. Take your pick from any of the specified grades.
The manual also states 6 quarts capacity. I've noticed that every time I refill with 6 quarts, it's always about 1/4 to 1/3 quart over the Full mark on the dipstick. This doesn't bother me at all, but if you prefer having your oil level no higher than the Full mark then refill with about 5.75 quarts after you drain the old oil. Also, follow the schedule specified in the manual. I plan to keep my car for a long time, so I use synthetic oil and change it every 5,000 to 6,000 miles. For the transmission, Valvoline Maxlife and Castrol Import Multi-Vehicle are considered by most members here to be better than the OEM SPIII fluid. Best to drain and refill the transmission every 30,000 or 40,000 miles (takes a little over 5 quarts for drain/refill).