Before automotive maintenance, the only way to keep your car purring like a kitten was to feed it catnip and park it at the top of a tree. Give your car some corrective guidance with today's Groupon to Commercial Tire, redeemable at nine area locations in Boise, Meridian, Nampa, Caldwell, Emmett, and Ontario in Oregon. Choose between the following options:

• For $20, you get an air-conditioning service (a $39.95 value).
• For $36, you get a four-wheel alignment (a $74.95 value). This service is designed for vehicles with adjustable rear suspension.

Commercial Tire sports multiple staffs of ASE-certified auto experts that keep vehicles in road-worthy condition through a variety of automotive services. Keep air in comfortable circulation with the air-conditioning tune-up, which preps A/C units for hot weather by making sure they blow air as cool as an igloo stocked with Ray-Bans. Cars that pull too much to one side can best benefit from the four-wheel alignment, which straightens out rides for vehicles with adjustable rear suspension. During the alignment, Commercial Tire's specialists take precise angle readings at all four wheels, calibrating the true and parallel position of a car's asphalt-kissing cylinders. They then set each car's rear thrust line to manufacturer specifications and center the steering wheel, leaving you free to drive home on a straight path without getting trapped in an endless circle inside a cul-de-sac.