I've been mostly using GC for the last four years in my
328i. I'm starting to use my car year round now and I know
that GC is thicker than most 5w30 oil's so wouldn't a 5w30
oil be better to use in normal winter temps? I have a small
stash of 5w30 Valvoline Maxlife Synthetic. I know the 0w
rating is great if it's -40 but what about at 0 to -18 celsius
(32 to -5 deg F) temps?
328i. I'm starting to use my car year round now and I know
that GC is thicker than most 5w30 oil's so wouldn't a 5w30
oil be better to use in normal winter temps? I have a small
stash of 5w30 Valvoline Maxlife Synthetic. I know the 0w
rating is great if it's -40 but what about at 0 to -18 celsius
(32 to -5 deg F) temps?