Looking at the specs for the Formula Shell Conventional 5W 30 SN rated ... me thinks it is not quite the same "best buy sleeper oil" it was touted to be with the former SM rated package . Noak at 14+ with the SN rated ? Perhaps not worth the special drive and effort to Costco to pick up a case on sale for $2.08 qrt. this month when for a couple dollars more you can buy a 5 qrt. jug of Mobil 5000 or QSAD conventional at WM with a little better specs .