I got a deal on Rotella T5 last week, and was planning to use it in a couple pieces of OPE that need that grade (10W30). My garden tractor is coming up on a change as well, and thought I might use that in it too. It has a Kohler CV20, but I also plow snow with it thru the winter. (I'm in upstate NY). I usually run a full synthetic 10W30 in the tractor all year (like M1 or PP), am I going to notice that the T5 is more viscous during cold starts, or will it be pretty much the same ?