1949-51 mercury dip stick info

[19Fordy]

Just changed the oil in my 8BA that has a 50 Merc rear sump oil pan and 50 Merc dipstick.
You can see small letter "M" the stamped on it from the factory.
Engine oil pan holds 5 quarts without the filter and 6 quarts with the filter as shown by markings on dip stick.

As you know the Ford and Merc blocks are the same except for the larger bore of the Merc.
My rear sump oil pan is from a complete stock 1950 Merc engine that I bought in 1967. It has a baffle inside. The Merc engine block was replaced with a stock 1953 Ford engine block in 1971 and I continued to use the Merc oil pan and dip stick to the present day.

The 1949-51 Lincoln Mercury Overhaul Manual Vol. 1 states as
follows on page 34:
Engine oil: Dry (including filter)................. 6 qts.
Refill: .................................................. .......... 5 qts.

Hope this clarifies some dip stick questions.