BMW 3-Series (E90 E92) Forum - View Single Post - 15w-50 for the hot weather months?!

BrianMN · 07-15-2012, 10:46 PM

lower viscosity oil does a better job cooling. The only reason you'd want to use heavier oil (or change oil weight in either direction) is to fix some negative characteristic.

What specifically do you think you'll gain by going to a heavier weight?

07-15-2012, 10:46 PM	#7
BrianMN Banned 114 Rep 2,428 Posts Drives: 4 Door Family Sedan Join Date: Sep 2009 Location: Minneapolis iTrader: (7)	lower viscosity oil does a better job cooling. The only reason you'd want to use heavier oil (or change oil weight in either direction) is to fix some negative characteristic. What specifically do you think you'll gain by going to a heavier weight?
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