Blue_Angel, welcome to BITOG!
I can see you've thought this through pretty well.
You certainly would benefit from running a high VI 0W-20 in the winter months in Ottawa. As has been mentioned, for piece of mind it would be best to install oil pressure/oil temp' gauge to make sure the oil doesn't get too thin when the oil is up to normal operating temp's and then some.
Another option is to simply run a high VI 0W-30. Unfortunately no one makes a 200 VI 0W-30. About the closest we have in Ontario is the Sustina 5W-30 with it's 194 VI but it is only a 5W oil.
Or go with a 60/40 blend of Sustina 0W-20 and 0W-50. This will give you the lightest 0W-30 oil possible on start-up. Lighter than all 5W-20's and even all OTC 0W-20's at least down to about -20C.
Unfortunately Sustina is very expensive but a much more reasonably priced option is to go with a TGMO 0W-20/M1 0W-40 blend. It's not quite as effective as the Sustina route but it will still produce a 200+ VI 0W-30. The following is a VOA of a 60/40 blend but a heavier 50/50 blend will still give you a 200 VI 0W-30 with a somewhat higher 3.1cP HTHSV vs 3.0cP:
http://www.bobistheoilguy.com/forums/ubbthreads.php?ubb=showflat&Number=3024542#Post3024542
Cheers
I can see you've thought this through pretty well.
You certainly would benefit from running a high VI 0W-20 in the winter months in Ottawa. As has been mentioned, for piece of mind it would be best to install oil pressure/oil temp' gauge to make sure the oil doesn't get too thin when the oil is up to normal operating temp's and then some.
Another option is to simply run a high VI 0W-30. Unfortunately no one makes a 200 VI 0W-30. About the closest we have in Ontario is the Sustina 5W-30 with it's 194 VI but it is only a 5W oil.
Or go with a 60/40 blend of Sustina 0W-20 and 0W-50. This will give you the lightest 0W-30 oil possible on start-up. Lighter than all 5W-20's and even all OTC 0W-20's at least down to about -20C.
Unfortunately Sustina is very expensive but a much more reasonably priced option is to go with a TGMO 0W-20/M1 0W-40 blend. It's not quite as effective as the Sustina route but it will still produce a 200+ VI 0W-30. The following is a VOA of a 60/40 blend but a heavier 50/50 blend will still give you a 200 VI 0W-30 with a somewhat higher 3.1cP HTHSV vs 3.0cP:
http://www.bobistheoilguy.com/forums/ubbthreads.php?ubb=showflat&Number=3024542#Post3024542
Cheers