Yup, still using about a gallon an hour! These days with turnarounds measured in days or weeks we get plenty of time to chase oil leaks. Done properly, this results in no more oil than you can clean away with a rag after flight.
We've recently used W100 and Phillips 66. In any given conditions the latter works best on 2800s for some reason whereas W100 always suited the C47/R1830. No idea.
BTW, new DC-6 forum over at
www.thedc6.com/forum by the Air Atlantique people. Not much to see unless you register, but it's new so probably waiting for input from us lot.