Car Cleaning Myth: Wax protection can be guaranteed to last up to one year

A claim may help sell a product, but Barry Meguiar says there are enough variables in place that make any such guarantees suspect.

A better strategy might be to consider those differences -- weather, use of road salt, whether your vehicle is parked outside or garaged -- and maintain accordingly. Meguiar's is taking that idea one step further with a personalized service that gives owners options based on their expectations.