i'll be changing mine this spring.  Almost to the 80hr mark and i always blow my leaves under my pine trees in the fall.  My maples drop them late and it got cold fast last year and stayed, so I just removed battery treated gas tank and called it a season.  I'd rather have changed fluids before storage, but winter seemed to come fast and stay.  Anyway I was hoping to change it on a nice weekend in March, but considering it's still single digits right now, who knows when.  just picked up the Hydro oil and filters off amazon.  I don't plan on changing every season if fluids look ok, outside of engine oil.
	
		
			
		
		
	
			
			 
				