With Walmart, you may need to ask. They logically locate the kleenex next to the dog food, so you may find Lemishine next to automotive supplies. I would try looking where the DW soap is first.
I specifically looked for it at Wal-mart just an hour ago. I would have missed it if I had been in a hurry, it was one row wide and behind a shelf hanger with sponges, completely blocked. And it was about waist height for me, this was at the "littleL Wal-Mart. I'll have to look at the Supercenter, forgot when I was there earlier.