Mobil Clean 5000 is good/cheap,although it's not a syn-blend.
Hallmark)My local Walmart usually only displays 1-2 jugs of the Motorcraft. Today said:I returned to the same Walmart today to purchase two of the MC 5W20 jugs (restocked). Despite assurances by an employee during the earlier visit(above post)that the tampered-with jug would be removed from the shelf, it was still there.
Hopefully, to alert other customers/discourage purchase, I removed the cap from the jug (thereby exposing the previously opened foil) and disposed of it.
Come and prosecute me Walmart!