I have 2011 BMW 335is. It seems my Castrol LL1 0W-40 A3/B4 oil is being phased out here in Canada. I'm a spec guy so I like to fllow manual recommendations and manual says LL01 so this limits me in terms of oil selection. The only oil at local auto stores left is the Pennzoil Euro ultra platinum 5W-40. I'm happy to try that I just wanted to ask to you folks how much "wear" am I adding in getting a 5W compared to 0W in winter temps? My winter averages are around -20c (-4F), sometimes on cold morning it can rarely be -30c (-22f). It's my understanding that is still somewhat OK for a 5W oil right and 0W only required for more extreme colds? My manual also lists grades to be used in conjunction with LL01 spec are 0W-40, 5W-40, 0W-30, 5W-30. I prefer to stick with 40s since I am tuned.
TLDR: In real life conditions, how much cold start/running wear protection am I loosing by going from a 0W-40 oil to 5W-40 in temperatures around -25c (13f).
TLDR: In real life conditions, how much cold start/running wear protection am I loosing by going from a 0W-40 oil to 5W-40 in temperatures around -25c (13f).
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