AMSOIL products are primarily sold through the mail and delivered by United Parcel Service. The vast majority of people who buy Amsoil products do so by ordering through the factory direct color catalog or from the on-line store. It's much easier to get the product information from the catalog. With the "preferred discount" the cost delivered to your door would be cheaper than picking the products up from a dealer, plus the fact that you can be sure to get the correct oil filters while most dealers don't carry them in stock.