SAE 40/50 is mono-grade engine oil established to keep the engine clean and thwart slush creation for versatile apparatus. It helps to safeguard the engine from rust and wear. Benefits: 1. Delivers superior engine cleanliness and preclude sludge formation. 2. Guards engine against rust and oxidization. 3. Offers outstanding engine wear safety. 4. Applications : Commended for diesel and gasoline engines of multi-purpose apparatus such as small wheels and water pumps. Health and Safety: This product illustrates no substantial health or safety threat when used under commended applications and apposite handling. Elude direct contact. Wash proximately after contact. What is the variance amongst SAE 40 and SAE 20W-50? SAE 40 is a mono-grade oil that has a viscidness within the distinct bounds when tested at 100C (212F) and 150C (302F). As a mono-grade oil, it cannot integrate any polymeric viscidness index reformers. SAE 20W-50 is a multi-grade oil. The W in 20W stances for winter, which designates that it has also been categorized for low-temperature performance, doesnot beat stated maximum viscidness limits. The 50 specifies that this multi-grade oil has a complex viscidness at 100C (212F) than SAE 40 does.