The invention of the horseless carriage revolutionized transportation and forced horses to settle for jobs as professional carousel riders. Keep cars running and horses standing with today's Groupon: for $20, you get an express oil change including a 15-point inspection and tire-pressure check at Tower Chrysler Dodge Jeep Ram (a $70 value).

Tower Chrysler Dodge Jeep Ram has serviced Calgary's vehicles for 40 years, relying on a team of manufacturer-trained and certified technicians to perform maintenance and mendings such as the express lane oil change. In about 30 minutes, mechanics reinvigorate engines' cardiovascular systems with a transfusion of up to five litres of conventional oil including a new filter to strain out sludge and road rage expletives. The oil change includes a 15-point inspection that visually investigates brakes, checks that windshield wipers are properly functioning and in season-ready shape, and tops off coolant, wiper washer fluid, transmission fluid, and brake fluid. Before rolling off onto the open road or nearest car show catwalk, a tire-pressure check makes sure tread patterns are wearing evenly.