Like an untamed wilderness or your big sister's diary, cars are composed of inviting outsides and insides that should only be explored by trained professionals. Entrust engine expeditions to intrepid experts with today's Groupon: for $27, you get fresh oil, a new oil filter, wiper blades, tire rotation, and a 24-point inspection (up to a $79 value) at Lou Fusz Automotive Network, which boasts 13 locations in St. Louis, Chesterfield, Creve Coeur, St. Peters, O'Fallon, and Fairview Heights.

For six decades, Lou Fusz’s savvy mechanicals have revived ailing autos with fresh fluids, tire care, and safety inspections that keep all components running at the same speed. Technicians rehydrate thirsty engines with a full dose of oil and lube (a $30 value). A new filter inoculates cars against oil-borne contaminants and other vehicular viruses, while windshields wipe their brows in relief with newly installed blades (a $34 value). After a team of trusty wheel-wranglers rotates tires to balance tread wear (a $15 value), a thorough safety check scrutinizes two dozen essential elements for signs of trouble, such as cracked casings or failed emissions tests stuffed into the undercarriage.

Lou Fusz's auto doctors release cruisers back into the blacktop jungle after 45 minutes to an hour. Drivers spend their brief downtime in the shop's lounge, staying energized with free coffee, WiFi access, and pick-up games of jai alai.