Putoline Boxer 4 15W-50 is a fully synthetic 4-stroke engine oil specifically developed for air- and water-cooled Boxer engines. Boxer 4 15W-50 guarantees: Unsurpassed wet clutch engagement, if your motorcycle is equipped with one. Extremely stable lubricating film and reduces internal friction. Low fuel consumption and very low wear values. Constant high oil pressure under all driving conditions Due to the special composition, a very low oil consumption is obtained with air-cooled Boxer engines.