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Old 02-09-2011, 01:42 AM   #222
sprintman
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Join Date: Mar 2008
Location: Canberra, ACT, Australia
Posts: 3,957
My Ride: Ex 325CI owner
GC and M1 0W40 are nearly the same viscosity at operating temperature.
M1 0W40 is a pretty thin 40W.
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