Oil type/weight recommended

I am not using it for any heavy plowing and it normally gets down to 15-25 degree mornings and only gets up around 45-60 for the next 3 months or so. Wish I knew what the prior owner used but I don't.

Sure would like a little input on this please, thanks in advance.

I will say that you tractor could be a candidate for switching to synthetic oil. If your tractor uses very little oil, I'd even go so far as to recommend a high quality 5W-30 synthetic oil. Again, stick with something rated for diesel service. Before someone screams at me for saying this oil is too thin... Our fleet of new Volvo diesel heavy trucks come with a recommendation to use 5W-30 oil. Winter or summer.

Now to those of you who dissed me a few days back for not recomending synthetic oil for that M - this is a completely different tractor. I tend to look at the application and age of the engine, as well as the benefits and cpsts of going synthetic.

hope this helps,

rif