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      04-04-2021, 05:29 PM   #7
pobrienny
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Drives: BMW X3, BMW 328 xDrive
Join Date: Mar 2021
Location: USA

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Potential cause?

Does anyone know of a reason why the American N20/N26 engines have this issue? I've heard it's the gas quality- do some people use 87 Octane? Just wondering since the European cars don't have this issue. My 2013 N26 has 150k miles and is running strong -inspected the chain when I replaced the valve cover a couple of months ago. On the other hand, my 2013 X3 I just picked up with 39k miles just started making the infamous whine. Thoughts?
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