Quote:
Originally Posted by kk2002s
I have thought that I would use M1 5W50 (April - Sept) as warm weather oil
M1 0W40 (Oct - March) for cold weather.
Car came from dealer, oct 2012 with new M1 0W40 + filter
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Just run the Mobil 5W50 year round. Unless you live in the artic tundra. Keeps it simpler for you and less waste. The 5W50 is a little hard to find, but the internet makes it possible to find.