Quote:
Originally Posted by chris240
I don't know if oil viscosity could be the cause of your problems but don't assume the dealer gave you the right viscosity. My dealer put in 5w30 in my engine when they should have used 0w20. I only caught their mistake after looking closely at the invoice. Lesson learned... don't assume anything and question everything.
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That's true. I just figured out my dealer is not using the recommended viscosity oil. They put 5w30 instead of 0w40 as BMW recommended. What can i do about it ??? Does this have any influence in the above mentioned diminished performance ???