John(UK) over on the Harry Ferguson forum swears by 10W30 not only for protecting the yellow metal but also because it stays fluid to a lower temperature than the GL-1. Having said that I did put GL-1 in my 202 which I bought from Napa, they had to order it but it was there overnight. Even in warm weather that stuff is thick and sticky, I can't imagine how it would be at -20. I don't plan to use the 202 much this winter as I have a TO-35 that I'm preparing. I will be putting 10W30 in it as it will be used in colder weather for snow plowing etc.
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