Jack:

I would use Mobil Delvac 1 5W40 in Canada. Dino oil of too high a viscosity (summer oil) is very likely to give you starting problems if you must leave the car outside overnight. If you have a garage, heated or not, you may not have much trouble. However, sitting in a parking lot all day.....

I lived in Sault Ste. Marie, ONT for three winters, I know!

Peter

__________________
1972 220D ?? miles
1988 300E 200,012
1987 300D Turbo killed 9/25/07, 275,000 miles
1985 Volvo 740 GLE Turobodiesel 218,000
1972 280 SE 4.5 165, 000 - It runs!