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      05-04-2019, 03:57 PM   #15
M Fifty
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Drives: M2 & 330CI
Join Date: May 2018
Location: The Interweb

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Ah - Confirmation Bias to the fore.

If you're ragging it on a track day there may well be reason to change the engine oil before and after, but that still won't be due to the fully synthetic oils involved breaking down.

Plus, unless your filter is gash, none of that is getting pumped around the engine - it's all being safely collected in the sump.

HTH
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