While researching for some info on the Mercon SP, I thought I saw somewhere that you had to get it at the dealer. However, I can't find that post right now to reply to it. Just wanted to let everyone know I was able to get it at my local O'Reilly's. I just had to ask for it. They keep it in the stockroom in the store and not on the shelf. It was $3.39 / qt.