Oil weight for E420
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Quick question. I have a 97' E420. What oil should I use? I see from past dealer records, they use 15W40, but isn't that a little "thick"?
Especially entering the cold months here in NY, shouldn't a lower weight oil be used? The car has been receiving standard oil from day one, not synthetic.
thanks
Dave
Especially entering the cold months here in NY, shouldn't a lower weight oil be used? The car has been receiving standard oil from day one, not synthetic.
thanks
Dave
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