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 $19, you get a full-service oil change at Best Western Transmission, valid at the Fort Collins location and both locations in Colorado Springs (a $39.95 value). As an added perk for this deal, Grouponers will also get a safety check, $15 off a transmission power-flush (full price for most vehicles is $189.90), and 10% off first $500 in repairs (up to a $50 maximum).

Best Western Transmission's ASE-certified mechanics keep autos running smoothly with their expeditious oil-changing service. During the 20-minute process, fully trained staffers gingerly lift vehicles on hydraulic lifts to drain grimy lubricant and tickle cars' sensitive underbellies with freshly cleaned dipsticks. A technician then funnels up to five quarts of motor oil into each car's thirsty reservoir, ensuring engine efficiency and low friction between its many moving parts. Autos are then subjected to a thorough 33-point inspection that, depending on the vehicle's make and condition, can take up to an hour. Technicians will examine filters, check fluid levels, and run the car through a gauntlet of diagnostic tests to determine the car's overall state of health and its propensity to honk at European-model cars.