Like violins, cars announce their need for a tune-up by squeaking shrilly and leaking oil every time you play Mahler. Keep your ride purring pleasantly with today's Groupon: for $29, you get an oil change and tire rotation at Fox Plaza Tire & Auto Service (a $59.95 value).

For 30 years, the ASE-certified techs at Fox Plaza Tire & Auto Service have outfitted engines with fresh oil and able-bodied filters. During the 45-minute process, mechanics replace old contaminated goo with up to 5 quarts of clean motor oil, which keeps engines spry and less likely to sleep until noon, and then lube the chassis to help it stay loosened up. Cars are generally too lazy to rotate their own tires, so Fox Plaza's people with do it for them, preventing the tread from wearing out in an uneven fashion while also encouraging balanced handling. Next, mechanics perform a free 27-point inspection, wandering with professional aplomb from the car's hood to its brakes and lights, confirming that everything's in safe operating order.