grober
MB Master
The main long term danger from overfilling with oil is if the crankshaft aerates the raised oil by constantly striking it causing a lot of air entrainment which might in turn promote a degree of oil starvation to the crankshaft , timing gear and big end bearings. The affects of this would only be apparent in the shape of reduced engine life. If you have not experienced what is euphemistically termed "sudden increased engine noise" its likely you have got away with it
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