Kind of depends on how cold it will get this winter where you live.
I'm using Chevron Rottella 15-40, but my weather is pretty mild. No snow and today it's in the mid 50's.
The reason I buy that brand is that's what they carry at Sam's Club and the price is good on a case of six one gallon containers.
Funny thing about Sam's is they have the best price on oil and grease, but hydraulic oil is very high there. I don't get that, but oh well.
Brands are up to you, I'm not convinced one is all that better than another, but there are those in the lubricant section that strongly disagree.
Eddie