New 0W-40 has a worse cold pour point, if nothing else.
I'm running it on my M3 wagon (didn't realize they had reformulated-- I wouldn't be had I realized sooner it was no longer LL01 certified) and have noticeably higher oil temps than my M3 coupe (TWS).
In short, I won't be running it again. I'll likely move the wagon to GC 0w-40.
Coupe gets tracked, so absolutely not moving it off TWS.
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2005 M3 Coupe, 2004 M3 Wagon, 2001 M5 Sedan, 2008 M5 6MT Sedan, 2012 128i M sport
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