your gonna have $100 oil changes without figuring for filters! Its gonna hold as much oil as the tranny in my truck or a big truck diesel!!!
Why such a volume of oil? I have a total of almost 10Qts...pan, lines and 2 large filters. I've thought of an accumulator but those have only 2 or 3 Qts. Is your tank used as an accumulator (kept under pressure) or just a spare volume of oil (for high angles).