I visited two large WM's near me : Both had all of the SP rated synthetic oils form M1 . Pennzoil , Castrol , Valvoline , Royal Purple and Quaker State ... The only difference was one WM also had left over SN+ QSUD - otherwise both the same . *I'll be using up my modest stash and then will be buying SP rated Synthetic oils on roll back as required for my home fleet .