I don't have any experience with this Rogue Oil Scavenger at all so I can not add anything here. What I did want to add was that a couple of weekends ago I was at the local HD shop getting a cup of coffee. I was talking to a guy who was there to sample the donuts. While we were jabbering away, the service manager comes by to grab a donut and coffee and this guy asks him about the Rogue Oil Scavenger. The service manager said it scavenges a little bit of dirty oil from a softail engine but when it was hooked up to a twin cam late model touring engine it would only get out 4-6 ozs., at the most. His position was that it was a waste of money. I piped up and asked him if he had ever used it and he admited he had not. His belief was that there was only a few ounces down in the sump on a touring engine and it was not practical to spend the money on this Rogue setup for so little oil. I was a little bit skeptical of his position but said nothing more because I have never seen it in action. Since then, I have watched the video on their web site and it certainly indicates it will remove much more than a few ounces of old, black oil. So, what about it touring bike owners. Ever had one of these? Does it get 2/3 of a quart of black oil out of your late model twin cam touring bikes or was the service manager just blowing smoke?