Despite their inability to speak, cars communicate signs of distress through warning lights, strange noises, and a refusal to return Coldplay CDs. Perk up a melancholy ride with today's Groupon: for $15, you get an oil change and tire rotation at Auto-Lab in Marshall (a $47.66 value).

The ASE-certified technicians at Auto-Lab, a NAPA AutoCare Center approved by AAA, reinvigorate cars with oil changes and a host of other maintenance services. During the oil change, mechanics coax sullied fluids from the car, swap them for up to 5 quarts of conventional oil, and install a new filter to protect the engine from harmful contaminants and youthful apathy. Techs then rotate tires, helping to distribute tread wear equally, prolong road life, and stabilize balance. To conclude the roughly half-hour service, mechanics administer a 33-point inspection of the vehicle, eavesdropping on essential operations and systematic functions to assess performance, confirm safety status, and mediate ideological debates between the bumper and the bumper sticker. The lab's mechanics guarantee all repairs with a one-year, 12,000-mile national warranty.

Though Auto-Lab sometimes features a discounted price online, this Groupon still offers the best deal available.