Sorry, just not a fan of Wallmart's prediditory pricing, which has destroyed a lot of small businesses, local Wallmart has poor staffing and mostly electronic checkout with long waiting lines, probably somewhat due to inability to hire staff, but they've recently announced a model to eliminate all cashiers and go completely electronic.
I've been a Mobil1 customer for 35+ years, without any issues, planning to stay with what has worked for me, with decent bundle deals and rebates, AAP has been very competitive pricing. Supertech may be just fine and dandy, but I have a long and successful history with M1, I'd probably try Castrol Edge EP before I'd go to Supertech.