Get 10% off Mobil 1 at Target

I finally got sick of taking trips to Wal Mart to see if the price dropped down again, so I went to Target. It wasn't on sale or anything, but at $4.34 was cheaper than everywhere else. When I went through the checkout line, they offered 10% off if I sign up for a Target credit card. (of course this wasn't just for Mobil 1) It wasn't even a detailed form and only took a few minutes. Just thought I'd let all the thrifty *cough* cheap shoppers like myself know if you're interested.