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      10-01-2012, 12:31 AM   #1
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Thought about using 15w-50 oil?

So the previous owner of my car used 15w-50 oil but ive noticed 10w-60 is recommended. Anyone have any thought of if this is bad for the car or if its okay to use?
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      10-01-2012, 08:52 AM   #2
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You shouldn't use anything but the 10w-60.
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      10-01-2012, 09:55 AM   #3
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BMW made the switch to 10w-60 back when the S54 rod bearings in the E46 M3 starting failing and they didn't know why. Prior to that, //M cars came with synthetic 5w-30. I used to regularly switch between 5w30 and 15w-50 depending on the season.

Technically you shouldn't use anything but 10w-60 but your car probably isnt' going to explode into a million pieces if you use something different.
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      04-06-2013, 09:51 PM   #4
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It will do in a pinch to top it off, as its better to at least have a proper oil level than dropping in a qt. of 15w-50 in the car. Instead of 15w-50 BMW recommends that you use a 5w50 as an alternative. In fact the owners manual even states so, even viscosity down to 10w40 for a topoff.

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