Silkolene Pro 4 is an ester-based full synthetic engine oil produced using Electrosyntec Oil Technology that Silkolene says releases the hidden power inside the engine — giving riders extra power, long-term performance and improved protection against engine wear. Electrosyntec technology extends the boundaries to provide the next generation of oil for the latest generation of engines. See Silkolene’s complete line of products at www.silkoleneusa.com.