With the ongoing Castro rebate, 16 bucks for 5 quarts isn't too bad for Euro K from Walmart.com.
https://www.walmart.com/ip/Castrol-Edge-5W-30-K-Advanced-Full-Synthetic-Motor-Oil-5-Quarts/291218344
Not a very popular oil around here with 0w30 ESP and Pennzoil Euro L or Euro LX being a bit more...