Hi Chuck,
One of the functions of the deep-sump oil pans is to move the oil level away
from the crank. To get maximum benefit from such a sump you also install a
deeper pickup, and that allows you to drop the oil level relative to the
crank - but then your dipstick reading will be similarly affected. So, there
is no one correct level for all applications. Probably the best method to
determine the 'full' level is still to put the correct amount of oil in the
sump, run it to ensure all the oil passages are filled, and then observe the
oil level on the dipstick.
Best regards,
Theo
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