A filthy exterior can crush your car’s self-esteem, drooping its bumpers and reducing its honk to a whimper. Boost your auto’s attitude with today’s Groupon: for $65, you get an interior and exterior detail and Sealtek paint sealant at Delta Sonic Car Wash (up to a $149.99 value). Today's deal is good at any of Delta Sonic's eight Chicagoland locations.

Unlike some car washes, Delta Sonic eschews rough brushes and cattle prods in favor of an innovative touch-free process specially developed to leave auto interiors and exteriors bathed and unscathed. Exterior detail work begins with a touch-less wash, which woos cars with its strong spray and soft lathers as it goes to work cleansing begrimed bellies and inhibiting unmentionable rust growth. Diligent technicians then lubricate locks and hinges, line wheel wells with Factory Black Undercoat, and swathe vehicle façades with premium wax to ward off wayward weather and incontinent sparrows. Meanwhile, interior detailers cleanse every nook and cranny, disencumbering dusty vents and vacuuming french fry–festooned floor boards while sudsy shampoos freshen up filthy fabric and mild solvents restore leather lusters.

Delta Sonic Car Wash detail technicians undergo 100 hours of classroom and hands-on training to assure that every auto is treated with extra special care, detailing each smudge-free sedan with mild, pH-balanced solutions designed by Delta-hired chemists, that help restore your ride's new-car smell, which is the fuel of cars of the future.

Reviews

Seven Yelpers give the Palatine location of Delta Sonic a four-star average, while three Yelpers give the Naperville location a near perfect 4.5 stars. Four Yelpers give the Melrose Park location a three-star average. More than 2,400 Facebookers are fans.

• Delta Sonic is the best place in town to get a high quality car wash short of doing it yourself. – Bob R., Yelp, Palatine location, 5/7/08
• Staff is very friendly and accomodating. I've never seen my car so clean and new looking. – Amy T., Yelp, Melrose Park location, 8/24/10