If Dorothy had never changed the Tin Man's oil, the Wizard probably would have just thrown away his spare heart. Show your car you have a heart with today's Groupon at Express Oil Change/Tune Up Clinic, valid at two locations in Alpharetta, two locations in Roswell, as well as locations in Buford, Sandy Springs, Atlanta, and Chamblee. Choose between the following options:

• For $45, you get a full-service oil change with up to 5 quarts of conventional oil (a $36.99 value), a tire rotation (a $24.99 value), a brake inspection (a $39.99 value), and a state emission test (a $25 value), which comes to a total value of $126.97.

• For $30, you get a full-service oil change with up to 5 quarts of conventional oil (a $36.99 value), a tire rotation (a $24.99 value), and a brake inspection (a $39.99 value), which comes to a total value of $101.97.

The ASE-certified technicians of Express Oil Change evoke beaming grill grins from vehicles and their people partners with a revved-up array of automotive services. The approximately 10-minute oil change rapidly bestows clogged up jalopy engines with 5 quarts of lubricating liquid, as well as a filter replacement, chassis lubrication, safety check of exterior lights, and inspections of the steering, suspension, and undercarriage. Wheels stolen from song-extolled buses are kept melodically turning with a tire rotation that utilizes computer spin-balance equipment, and a meticulous brake inspection prevents accidental speed-induced time-traveling excursions. Green-minded motorists, or those looking to prove their polish at the DMV, should opt for the emission test, which measures the pollution level of any garlic-chewing or fog-spewing exhaust pipe's breath. With requirements for a yearly emissions test on all vehicles over three years old, customers can knock this item off their yearly to-do totems early.