As we all know manufacturers alter their product specs in order to meet Wal-Mart mandated prices, the question is with oil, and in many cases Wal-Mart is the only outlet to carry 5 quart jugs, do the Pennzoils and Mobils of the world alter their oils for Wal-Mart sales, use fewer or less potent additives etc. Is it the same oil sold elsewhere? Is Ultra 5W30 the same oil when analyzed as that sold at Auto Zone?
Has anyone had VOA done on the same viscosity oils purchased at Wal-Mart versus say AA or another outlet?
Has anyone had VOA done on the same viscosity oils purchased at Wal-Mart versus say AA or another outlet?