The National Marine Manufacturers Association tests and certifies the products of manufacturers. The goal of the rigorous certification process is to set a high standard for quality and safety. Currently, the NMMA certifies a variety of TC-W3 oils, FC-W oils, and FC-W (CAT) oils.
In the mission statement on their website, NMMA states, “To help boaters recognize lubricants that will give the engine life designed-in by marine engine manufacturers, the National Marine Manufacturers Association has developed a program for the certification of these premium quality lubricants.” NMMA certification is two-fold. First the oil additive packages are certified and then there is a registration of oil brands that use certified oils. Amalie Oil is one such brand that is certified under their XCEL Outboard and 2-Cycle Oil.