No I don’t.
But be specific, walmart cheap oil? Synthetic I assume ? I’m sure they are always switching suppliers. I’m not a Mobil 1 soldier or anything but I’m betting if you get walmart and Mobil 1 they will not have the same results on a voa. People read bitog and become tribologists and oil experts overnight. Stuff is always changing, and 99% of average car people including enthusiasts will not have problems with x brand vs y.