in case you're not aware of it, the advance auto website has been offering some pretty good deals with the use of promo codes. you can use them multiple times as long as you check out as a guest. i've saved some major cash recently using these...
P20 - 20%off your enire purchase
BIG30 - $30 off when you spend $100
VISA - $30 off of $100, $20 off of $50, $10 off of $25
just wanted to share the savings...