The recommended oil change interval for a John Deere Gator utility vehicle will depend on the specific model and engine, as well as on the operating conditions. It is recommended to refer to the operator's manual for the specific model you have for the recommended oil change intervals. Typically, it's recommended to change the oil in a Gator every 50 hours or once a year, whichever comes first. However, it's important to note that if you use your Gator in severe operating conditions such as very high temperatures, dusty or dirty environments, or heavy loads, the oil change interval may need to be shorter. It's also important to note that, aside from the oil change, it's recommended to check the oil level regularly and make sure it is at the correct level, as well as check the oil filter and replace it as needed. Also, using the recommended oil type and quality by John Deere will help ensure optimal performance and longevity of the engine.