New Sears online coupons go live every Saturday or Sunday, with new 48-hour site-wide sales posted two-four times every month.
Check out the Twitter feed which is updated every day with automobile news stories, and tips for maintaining your own vehicle's accesories.
Ground shipping is free on all orders over $50.
Advance Auto Parts always has great codes available, sometime getting as high as $40 off purchases of $100 or more (or 40% off), but those are rare.
Walmart offers free shipping on eligible orders of $45 or more. They also have free shipping throughout the year on select items. They advertise the free shipping on their site, so you will always know what has free shipping and what doesn't. You can also have your purchase shipped to any store of your choice for free at any time.