I've read all the old posts on fluids, so maybe I shouldn't be posting this, but am up in the air which to use; low viscosity or just hygard. I know lots of you have years of experience with hydrostatic transmissions and I want to get your opinion. Now my reason for asking is: The two dealers I have dealt with, one says use only low viscosity, the other hygard. Owners manual says it comes from factory with low vis and to use it. Then a paragraph down it says use the viscosity that best matches the temperature range I will be operating in the most. Being this far south, I want be using it even close to 0 degrees, but use it a lot in the high 90's. Oh yeah, it's a 1025R.