Quote:
Originally Posted by GrannyShiftG80
So 4000 miles on OEM oil and viscosity has already thinned out below spec ?
And BMW wants 10,000 miles between oil changes lmao
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Viscosity would probably go back up by 10K miles from oxidative thickening.
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Past-18 F80 M3 Comp, 11 E90 M3 Comp, 97 328is, 95 E36 M3, 89 325ix