I keep reading mixed things about these two different weight oils. I live in Chicago so during the winter, temps are known to get pretty low (in the negatives sometimes). I was told that 5w-40 (I've been using Liqui-Molly 5w-40 since 2019 and have no issues) is the best oil to use in the climate and the way I drive (like an old grandma at the age of 22 ). But, some BMW forums are saying 0w-40 is better than 5w-40 because it doesn't wear faster than 5w-40 does.
Here's a UOA done on this guys BMW N52 using both 0w-40 and 5w-40 weigh oil if anyone wants to read it:
Here's a UOA done on this guys BMW N52 using both 0w-40 and 5w-40 weigh oil if anyone wants to read it:
N52 Oil analysis
www.bimmerfest.com
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