A dealer may not sell at retail alcohol-blended gasoline unless the dispensing unit and any price advertising bear the name of the alcohol blended with the gasoline if the alcohol-blended gasoline consists of one percent or more by volume of any alcohol. The disclosure must be in letters at least the same size as those used for the label of the basic grade of gasoline and must be next to the gasoline grade label. A producer of alcohol-blended gasoline may provide a retailer with a label promoting the benefits of alcohol-blended gasoline, if the label at least meets the requirements of this section.