5-Series (E12,E28, E34, E39, E60)Chat relating to the BMW 5-Series of all generations. Specific models include: BMW 518, BMW 520, BMW 520i, BMW 530i, BMW 528i, BMW 530i, BMW 518i, BMW 524d, BMW 525i, BMW 525e, BMW 528e, BMW 540i, BMW 535i, BMW 520d, BMW 525td, BMW 525d, BMW 530d, BMW 525i/xi, BMW 530i/xi. (BMW 5-Series Forum)
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Most people use 5W-30, 0W-40 or 10W-30 ... it all comes down to what you prefer and what your engine seems to run best with.
I've been running on 10w-30 for as long as I've had the car and it seems to be fine.
And please check what the previous owner was using as far as synthetic vs petroleum based ... a switch from one grade to the other can bring along more leaks than you want.
oils ain't oils ,,, ask your local mechanic for some legal advice on choosing suitable oil for your engine/driving conditions ..also check your user manual it should have operating temps for different grades of oil ( recommended)used:
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