We evaluate lubricants used in a variety of two- and four-stroke cycle, air- and water-cooled engines used in outboard marine, and small utility engine applications. Over a dozen test methods based on ASTM-TC, National Marine Manufacturers Association (NMMA), International Standards Organization (ISO) and JASO standards are available to evaluate lubricants ability to resist combustion chamber deposit-induced pre-ignition, prevent ring sticking, inhibit deposit formation, reduce scuffing, resist spark plug fouling and reduce exhaust smoke.
