I wish I would have taken a picture.
When I bought my # 1250 I asked the previous owner about his maintenance. He was quite adamant with his answer!
He changed his oil (hy-tran) & filter once a year every summer. It's not that I didn't believe him but? Getting it home I wanted to make an inspection for myself. I dropped the plate & drained the oil. It was just so clean & was very much impressed. So with my # 1250 being my main grass killer & my # 127 for snow duties & back-up I do the same. A few bucks more its once a year with a change & filter.
Peace of mind.
NIK,
But you do what you want when your lord & master of your equipment.