Sams Club "Certified" was made by Warren here in SC, now they switched to this new one.
I looked at the container a while ago and I am pretty sure I saw no mention or symbols indicating Warren... not as interested this time around as I stocked up on Chevron for the year because Sams Club did not have a 5/30 oil on the shelves during the transition to the new branded oil.
NOTE: These are not "SYNBLEND" like 5W-30.
Havoline is $14.97 for 6 quarts or $2.495 a quart.
Prime Series is $21.18 for 12 quarts or $1.765 a quart.
So the savings is there.