You should wax your vehicle on a regular basis to protect your paint’s surface and preserve its shine and color. Waxing your car is preventive maintenance, just like changing the oil or rotating tires.
How often you apply wax to your vehicle will depend on your vehicle’s current paint condition and the type of car wax product you are applying. Most product labels say to wax your vehicle every 30 to 45 days, and you can pretty much throw this timeline out of the window. Remember the product manufacturers obviously want you waxing your vehicle as often as possible, so personally I would disregard this recommendation.
You may want to wax your car once every 30 days if you are desiring a deep shine and you mostly use quick detail wax or finishing wax. You would not want to use a rubbing compound, or highly abrasive cleaner wax that often as doing so could damage your vehicle’s paint.
One way to determine generally whether your car’s paint could use a wax application is to wash the vehicle with water, and observe whether the water forms beads on top of the paint or forms sheets of water on the car’s surface. If the water mostly beads up on the vehicle’s surface, a wax application is probably unnecessary. If the water does not bead up, but falls into flat sheets on top of the vehicle’s surface, a wax application would be recommended.
A second way commonly used to determine whether your car needs a polish application is known as the squeak test. Fold a microfiber or terrycloth towel into a hand-sized square and press firmly to the vehicle’s surface. Twist the towel with your hand. If the twisting creates a squeaking sound, it is probably time for a wax application. If you hear nothing, a wax application is probably not needed at this time.