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: for $20, you get a full-service oil change with up to five quarts of conventional oil and a tire rotation at Express Oil Change & Service Center (a $58.94 total value). Choose between locations in Baton Rouge, Louisiana; Destin, Florida; or Hattiesburg, Mississippi.

The ASE-certified technicians of Express Oil Change prompt 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 five 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 (a $38.95 value). Wheels stolen from song-extolled buses are kept melodically turning with a tire rotation (a $19.99 value). Express Oil Change packs its resume with 31 years of experience as automotive-service providers and points to its success with locations in 10 states, which include not just the gas, solid, and liquid states, but seven others scientists have classified.