Originally Posted By: 901Memphis
Yeah they just changed the formulation to meet API SN for all grades it seems.
And lost my business when they did it. The last of the good/old stuff was gone from the shelf at my last WalMart visit, I picked up Mobil-1 High Mileage instead.
It was nice while it lasted, I suppose. A reasonably-priced synth blend with a stout additive package that my engine (lifters in particular) liked. Ah well, adios SOPUS.