Oil scavenger
I'm sure the OP has good intentions but his gadget just doesn't pass the sniff test if he wants to know ALL the old oil is completely gone. If someone really wants to do this, the free/cheap method of connecting a 2 dollar clear hose to the return line is the way to go about this.
Again, I'm not arguing against this thing, just want to put out there want I have learned so far...which I'll add doesn't even scratch the surface, but it makes sense. First, you warm the bike, this lifts a lot of crap in the sump and gets it flowing. Then when you begin to drain it, some of the potential sludge or contaminates flow out with the oil being drained. Then when you put on that new filter and fill her up with new oil, when you fire her up the new filter picks up a lot of the leftover potential contaminates. Is your oil going to get darker sooner, sure, it quickly mixes with the minimal remaining oil. Then we repeat this cycle every 3 to 5 thousand miles which extends the life of these great machines!
It's not all dome and gloom people, really, the sky isn't falling and with millions upon millions, if not trillions of miles having been logged on this vary system. We're not talking about a system as sensitive as your internals body plumbing, we're talking about heavy pieces of metal, with veins large enough to pass things on through to a oil filter (kidneys) to be pissed out every 3 to 5 thousands miles. Do some owners run into the occasional kidney stone? Sure, but do the math and figure the odds.
They haven't changed the oil system design for a reason - it works!
Last edited by tbonetony06; Feb 29, 2012 at 01:25 AM.
The Best of Harley-Davidson for Lifelong Riders
Here's a test that everyone can do next time you change your oil. Keep a small sample of your clean oil in a clear container. After you change your oil and run the bike for a few minutes to allow all the oil to circulate, allow a small sample to run off of the dipstick into a clear container and look to see how much color difference there is between the samples. Sound reasonable?
Last edited by richmac64; Feb 29, 2012 at 03:36 AM.
I don't think this is the simile you are looking for.
Rather, you want a complete blood transfusion, replacing every little molecule, to ensure that only fresh new blood is flowing in the system.


