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View Full Version : What grade oil to use in a 540iA?



merlin
09-15-2007, 11:26 AM
I have no clue what the previous owner had been using. I live in Seattle and the car has 123k miles.

What grade would you suggest?

Also, did these cars come from the factory with synthetic or dino juice? I'd hate to start putting in synthetic only to start developing leaks due to sludge being washed out of seals.

Thanks all.

Tiger
09-15-2007, 11:49 AM
Just put in synthetic... 0W40, 5W40 or 5W30 is all good.