BMC Filter vs K&N Filter?
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Joined: Dec 2017
Posts: 187
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From: Calabasas
2018 C63 Coupe
I used to run aftermarket filters in my previous cars. I stopped after seeing oil analyses from cars with stock filters vs. aftermarket oil-impregnated cloth filters, like K&N and BMC. The amount of silicates in the oil was much higher. High enough to be a problem? No idea, but the minor performance gains weren’t worth it, to me.
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Joined: Jun 2014
Posts: 1,589
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From: IL
19 E63s, 23 M3 compX, B9 SQ5
I used to run aftermarket filters in my previous cars. I stopped after seeing oil analyses from cars with stock filters vs. aftermarket oil-impregnated cloth filters, like K&N and BMC. The amount of silicates in the oil was much higher. High enough to be a problem? No idea, but the minor performance gains weren’t worth it, to me.
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