Im not sure what is specd for this car..is it back specd to 0w20 or stick with 5w20? Will be alot of cold starts in Montreal from now til Spring. Not garaged nor plugged in. All recommendations appreciated. Its a friends car, and oil is very dark..he just bought it..so no idea when it last got changed...so im thinking of going either Mobil 1 5w20 or TGMO 0W20 with a fram ultra..hoping the Ultra is able to hold/pick up all left behind dirt from last oil change..no idea when it was last done..i know not to judge by color but its clearly dirty..