Hey guys,

I notice a lot of ppl on the board like M1 0w40. But I'm not quite sure what climates those guys live in.

I live in a climate (ottawa,canada) where the winter can be quite cold and the summer is hot. Is it a good idea to run a different grade for each half year?

What grade is recommended? I'm not sure if the recommendations for dino oil grades are the same for synthetic. Here's a rough idea of my climate below(in degrees celsius) ... Ideas appreciated


J F M A M J J A S O N D
Maximum -5 -4 2 11 19 24 26 25 20 13 5 -3
Minimum -15 -13 -6 0 7 12 15 14 9 3 -2 -11
Mean -10 -8 -2 6 13 18 21 19 14 8 1 -7