The faster this SN Plus stuff gets gone, the faster the improved formulas SP /GF6 rolls onto Walmart shelves.
Great buy for the now-old cert SN Plus users. Thanks for posting.
According to this from Pennzoil, SP does not replaces SN PLUS and makes it obsolete. API SN PLUS will be shown on donut if applicable.
Excerpt from Pennzoil:
The ILSAC GF-6 performance standard is a direct replacement for the ILSAC GF-5 performance standard—not for the API SN PLUS service category.
API SN PLUS is a supplemental service category that API adopted to provide consumers with motor oils that helped reduce the occurrence of Low-Speed Pre-Ignition (LSPI) in smaller, TGDI engines while the ILSAC GF-6 standard was still in development.
API will introduce a new API service category, “SP,” which will be derived from ILSAC GF-6 and licensed to motor oils for gasoline engines. While API SP will be backwards-compatible to previous API service categories, motor oils will still be able to be licensed as meeting the API SN PLUS, SN, SM, SL or SJ categories. API allows licensed motor oils to display the API “donut,” which indicates which API service category the motor oil meets.