like said above. But id just use 10-30 and top up regularly. I found thick oil Eg 20-50 may not leak or burn as much. But turns into sludge, this can cause more problems.

I no my dc2R gets 5-30 and my CRV gets 10-30 Neither drink or leak!

Also 10w is good to something like -5 degress. In Sydney it never gets that cold!