BOSS 4T - 20W40 - API SJ JASO MA2

Motorcycle Engine Oil (MCO) is specifically formulated for use in motorcycle engines. It is designed to provide lubrication, cooling, and protection to the engine components under various operating conditions. The "4T" in the description indicates that it is suitable for four-stroke engines, which is the most common type of engine found in motorcycles.

The "20W40" specification refers to the oil's viscosity rating. Viscosity is a measure of the oil's thickness or resistance to flow. The "20W" indicates its viscosity at low temperatures, with the "W" standing for "winter." The "40" indicates its viscosity at high temperatures. In this case, the oil is relatively thin at low temperatures, making it easier to start the engine, and it maintains its thickness at high temperatures to provide adequate protection to the engine components.

The "API SJ" designation refers to the American Petroleum Institute (API) service rating. API SJ oils are designed for use in older engines and offer a basic level of protection.

The "JASO MA2" specification refers to the Japanese Automotive Standards Organization (JASO) rating. JASO MA2 is a higher specification that meets the requirements for motorcycle engines with wet clutches. Wet clutches are commonly found in motorcycles, and using an oil with JASO MA2 rating ensures proper performance and longevity of the clutch system.

The brand mentioned is "BOSS," which is the manufacturer of this particular motorcycle engine oil.

Keep in mind that using the recommended oil grade and specifications for your motorcycle is essential for proper engine performance and longevity. Always consult your motorcycle's owner's manual to determine the correct oil grade and specifications for your specific model.