The H.O. numbers are impressive with 500 hp at 2,600 rpm and 1,200 lb-ft at 1,600 rpm.I had the base 6.7 diesel years ago in an F250. Power was amazing!!!
I think that that engine needs 10 or 12 quarts of oil. The HO unit may be more. IDK. I would suggest that you check the level after it is warmed up.... But check the owners manual.