Went to Walmart today to scoop up on some clearance Royal Purple 0W-20 and saw that they finally had individual quarts and 5 quart jugs of Castrol GTX Magnatec. Sorry for the poor picture, I had a few employees rounding the corner into the aisle as I was taking the picture and tried to hurry my phone back into my pocket. This location only had 5W-20 and 5W-30. I was expecting it to be more in the $17-19 range, but $21 doesn't seem unreasonable.