Being close to Texas (unofficial home of Walmart ... LOTS of them), I would look for "the deal" on Rotella Synthetic. I have found a few gallons marked at $12.88 ... at this price it is probably the cheapest CH-4 you can find.
I have used Delvac 1 and M1 15-50, but am gonna switch based on price.
Everyone says they don't like these oil threads, but, c'mon, there aren't many topics in the world of mechanic'ing that one can be convincing about based solely on one's opinion!
