Silkolene Pro 4 is an ester-based full synthetic engine oil produced using Electrosyntec Oil Technology that releases the hidden power inside your engine; giving you extra power, long-term performance retention and improved protection against engine wear. Electrosyntec Technology extends the boundaries to provide the next generation of oil for the latest generation of engines. Silkolene oils are specifically formulated for both street and off-road motorcycles and were developed through extensive testing with factory race teams to deliver outstanding performance. From the professional racer to the everyday rider Silkolene’s got you covered with a complete range exceeding JASO-MA2 standards. Available in 10W40 or 15W50, with specific labeling for either street or off-road customers.