To know the price and see more samples of products, visit our website SAE 50 engine oil is a type of high viscosity motor oil that is commonly used in older, high-mileage engines, particularly those in heavy-duty vehicles such as trucks and tractors. It is also commonly used in some classic and vintage cars. SAE stands for Society of Automotive Engineers, and the number 50 refers to the viscosity grade of the oil. Viscosity is a measure of an oil's resistance to flow, and higher viscosity oils like SAE 50 are thicker and less likely to leak or burn off than lower viscosity oils. Since SAE 50 oil is thicker than many other grades of oil, it can provide better protection against engine wear and tear. It is also less likely to break down under high temperatures, making it a good choice for engines that run hot. However, SAE 50 oil is not suitable for use in all types of engines. For example, it may be too thick for modern engines with tighter tolerances, which require lower viscosity oils to function properly. Additionally, SAE 50 oil is not recommended for use in extremely cold temperatures, as it can become too thick to flow properly. Overall, if you have an older, high-mileage engine or a heavy-duty vehicle that requires high viscosity oil, SAE 50 may be a good choice for your needs. However, it's always important to consult your owner's manual and follow the manufacturer's recommendations when choosing an engine oil.