X2 John,
You will see I was careful to say high & low marks!!
It is surprising that Roy has not chimed in as he has strong views on oil levels.
I do think though that running at the high mark on some motors could restrict the turbo drain, causing the turbo bearing cavity to flood & if the turbo has an oil seal issue, it could allow oil into the inlet & contribute to a run away.
__________________
Grumpy Old Diesel Owners Club group
I no longer question authority, I annoy authority. More effect, less effort....
1967 230-6 auto parts car. rust bucket.
1980 300D now parts car 800k miles
1984 300D 500k miles
1987 250td 160k miles English import 
2001 jeep turbo diesel 130k miles 
1998 jeep tdi ~ followed me home. Needs a turbo.
1968 Ford F750 truck. 6-354 diesel conversion.
Other toys ~J.D.,Cat & GM ~ mainly earth moving
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