Tractor
The simplest answer to this question is that the Massey Ferguson 35 tractor takes an inexpensive, lightweight, multigrade 10w30 engine oil. This oil is generally suitable for most ambient temperatures, and can provide adequate protection for the tractor engine year-round. However, if your tractor is operating in particularly cold or hot environments (below 0°F or over 100°F), you may want to consider an oil specifically designed for those conditions. The Massey Ferguson 35 tractor also requires a diesel-specification engine oil, so make sure to purchase an oil labeled as such. Additionally, look for an oil rated for the U.S. Military Specification MIL-L-2104H, which gives further assurance of quality and protection.