Vehicles bogged down by dirt make for ineffective getaway cars and are often beaten by slick convertibles during Miss American Automobiles pageants. Champion beautiful, race-ready roadsters with today's Groupon: for $20, you get three HydroMax washes at HydroClean Express Car Wash in Round Rock (up to a $48 value).

Housed in a sanitizing tunnel, HydroClean Express Car Wash invites pavement prowlers to plunge headfirst into the torrent of purifying elixirs, as its HydroMax wash obliterates dirt with turtle wax, clear-coat protectant, wheel foamer, and tire shine. Annihilate your car's stubborn filth with a vigorous soft-cloth massage, which makes way for a foam blast that leads to a spot-free rinse using clean water. Towel-wielding attendants and pillars of fresh air team up to dry street skimmers. After the HydroMax wash, motorists can hop out to use complimentary vacuums to suck up crumbs and movie-ticket stubs from 1983.

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