Been there, done that. On 24 qts. of Schaeffer's 7000 5w30 a year ago. Due to mitigating factors (darn you, Auto-RX and cheapo Pep Boys oil change specials!!!
) it hasn't been used up. Probably when it is, I'll spend another $100 or so on some more.
I find these good deals that are just too hard to pass up. I would rather do some free oil changes for the family than to pay full price for oil...