20W50 Weight Oil

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20W50 Weight Oil

01-22-2000, 12:25 PM

Southern

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Join Date: Jan 2000

Location: Carol Stream, Il, USA

Posts: 605

I purchased a 1998 E320 from Southern California. The car has used 20W50 weight oil since new. I live in the Chicago area and was told by my local mercedes dealer that they use 10W40 weight oil in the winter. Since the car's computer calculated 4000 miles since the next oil change, the dealer told me that the 20W50 weight oil is fine. The car has averaged 12 to 15K miles between oil changes (which is an entire year of driving for me), should I be concerned about driving in freezing temperatures with 20W50 weight oil or should I have the oil changed to 10W40 weight oil for the winter?

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