Answer: Massey Ferguson 150 tractors use a 15W-40 engine oil that meets the requirements of API CJ-4, CI-4, CI-4Plus, CH-4, SL and any other previous categories. 15W-40 oil is designed to meet the needs of diesel and gasoline engines and is appropriate for a wide range of temperatures. This oil should be changed after every 200 hours of operation or twice a year, whichever comes first. Additionally, the oil filter should be changed with each oil change. Always make sure to check your operator’s manual for confirmation, as oil requirements can vary from one machine to another.