Pistons and shafts overheat and seize up unless protected by a slick, shiny coating of oil, just like classical Greco-Roman wrestlers. Keep your engine parts from throttling each other with today's Groupon: for $39, you get a maintenance package that includes an oil change, tire rotation with nitrogen injection, 21-point inspection, and car wash from Sands Chevrolet (a $119 value). Today's Groupon can be redeemed at Sands Chevrolet locations in Glendale and Surprise, and at Sands Kia in Surprise.

With a full-course selection of preventative scans and treatments, Sands Chevrolet's diagnostic diviners sniff out problem spots in roadsters of all stripes. Sands' standard oil change swaps out winded sludge for fluid with a fresh set of legs, while newly installed filters flex bouncer muscles, keeping engine clubs exclusive by denying crashers such as friction-causing contaminants, meltdown-minded debris, and leisure suit-clad sacks of sugar.

Sands also gives wheels the royal treatment with specialized tire treatments. Tire technicians complete wear-saving rotations and keep boot-damaging water and oxygen from rubber innards with concentrated blasts of its nitrogen injections, leaving roadsters with a confident grip to navigate hairpin turns and execute floor routines in hatchback gymnastics.

Sands Chevrolet's sleuths also snoop for superficial trouble with a 21-point inspection, eyeballing vehicles' vital systems for signs of disquiet. Service experiences end on a sudsy note with a full car wash, rinsing away highway gunk, drab dusts, and the tags of roadrunner graffiti artists.