I think that is true with all large engines, I have trucks with Cats, Cummings and the series 60 in or Prevost. I have 01, 04 and 06 engines and if you fill to the top they will just push the oil out the draft tube to the 1/2 way point and stop. I always test each engine first by keeping them full and if they end up at 1/2 then thats where I refill when I change the oil.
Kevin