Well, I picked up 5 Litres of Mobil 1 SS 10W 30 at Wal-Mart today. It says "Older car formulation" for the 10W 30. For the 5W 30, it said "Newer Car Formulation" Is there a "Newer Car Formulation" for SS 10W 30? If so Wal-Mart didn't have any.