We talked about this before so I'll start a thread specifically for coupon codes so they are easy to find. Post your Advance, RockAuto or whatever code you can find. I'll start with...
Advance Auto Parts Coupon:
$50 off order over $125,
$40 off order over $100,
$30 off order over $75,
$20 off order over $50,
$10 off order over $25. Online only.
Code: WD514
expires 4-11-15
15% off nearly everything! Plus spend $50 and get $25 toward a future $50 or more order! Customers must be logged in to receive coupon. Coupons will be e-mailed out by April 22nd, 2015. Online Only.
Code: D52
Expires: 4-11-15
I'll post newer codes as they come available. There are numerous old codes that are still good. So if you have a big order it's to your benefit to break your order up into smaller orders to maximize your discounts.