Google Offers has the Auto Care Special 3 Oil Change Bundle for $30. (Free shipping applies to a punch card, the only shipped item.)
Note that it's only valid in 20 states; click here for the full list: http://www.autocarespecial.com/unitedstates
3 oil changes, 2 tire rotations, engine light diagnostic.
Battery test, vehicle inspection.
Valid at your choice of nationwide location.
Convenient punch card.
Free shipping for punch card (valid for 1 year from date of purchase).
Participating locations include Firestone, Midas, Meineke, and more. The voucher ends August 30, and the deal offer ends May 30 at 8 am ET.
Scroll down the page for the Deal, Terms, and How to use this Offer.