Mobil 1 is the correct oil and 5W-20 is now the recommended weight, use 5W-20. Some time back, Mobil 1 realigned their weights and Mobil 1 0W-30 is no longer in their product line-up. I usually find it at Wal-Mart and get the 5 quart jugs.
Edit - Oops, I see that Mobil 1 now offers Mobil 1 Racing Oil in 0W-30; however, use the 5W-20.