This is what happened to me, and when I shared it with the Inventory Manager on the sales floor while I was awaiting my car's return from the oil change for which I had gone out and BOUGHT the oil... he took a photocopy of the receipt. Then a few days later I got a check in the mail for the cost of the oil, and a note in email saying that the service manager will be certain to stock 0W-20 for the hybrids from now on .