I need some advice from you veteran ATV’ers.

I have a 2012 Polaris Sportsman 550 that I purchased new and use just for plowing in the winter and the occasional "chore" around my property, like hauling wood, moving a trailer, etc. It does not go out on trails or do any off roading. I take it in each fall to have the oil and filter changed and have it inspected by the mechanic. They always tell me everything looks good. Should the demand drive fluid, rear gearcase oil or transmission oil or anything else be changed at this point ( 3 years). I just want your opinions before I pose this question to the people at the place where I have it serviced.