Switch to Amsoil and run the :stac: out of the bike & I mean run it, WOT to red line through the gears and plenty of engine breaking for a couple of hundred mile and I guarantee your oil use will fade to zero. :deal:My thoughts were really, how advanced was the oil in 64. I just wanted to see if anyone else had done this before doing it myself. I plan on primary and engine sump for it. For my 08 VRSCDXA, I will stick with SE for now just because of how much oil I'm burning (if it becomes a warranty issue). I called HD and they said that a qt/1000 miles is in spec. I only have 5K on the bike right now, and it sucks to have to put a quart of oil in the saddlebags because I'm making a weekend trip.