Heh we just got back from stocking up. I got 2, my wife got 2, my mom got 2...
It's not really lieing though as I do their oil changes, just all the oil comes to my garage.
Worth noting though it's not a "mail-in" rebate, you fill out the form online and they e-transfer you the rebate. All they want is a digital copy of the receipt. Took a picture of it with my phone and submitted the form on my phone with said picture. Easy as pie.