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[cahdbiker]

If you follow correct procedure for an oil change, and if your oiling system is working correctly, you will only have somewhere between four and eight ounces of oil left in the sump.  If you really think you have 32 ounces of old oil remaining in the engine after an oil change, you really should get that POS to the shop right away 'cause something is far from copacetic.

If you have a Twin Cam and want to know exactly how much oil is left in your engine, remove the casting plug in the bottom of the cases and measure what comes out.  Don't do it often, that plug is not like a real drain plug and it isn't designed to be used like one.  But if done carefully one time, you may be enlightened as to how little oil is really left in the sump (assuming you followed the oil change procedure).  On an M8 you can remove the crank sensor from the bottom of the case and measure what comes out.

Trust me, if you take your car or truck to a fast lube joint for oil changes, in most cases they are leaving more than four ounces in your engine.  They don't wait around for all the oil in the top end to drain down completely, they pull the plug and when the oil flow slows to a trickle they jam the plug back in the hole to help meet their time limit.  It's one of the many reasons I still change my own fluids in all my vehicles.  I take the time to be thorough, not many for-profit shops do the same.  Also, unlike those shops I have never had a filter dump all my new oil out because I didn't check for and remove the old filter gasket or didn't tighten the filter properly, I've never stripped a drain plug, I've never put the wrong fluid in any of the various "holes", and I've never damaged my vehicles in any way while doing the service.  Most of those fast lube places cannot honestly make the same claim.  And I count the average Harley dealership oil changers in the same category as those kids in the fast lube places btw. 

Jerry

HI Jerry, next time I change oil  I will measure what comes out  compared to what I put in. Considering  what is in the filter and viewing the Scavenger Puck video I am sure you are mistaken regarding the four to eight ounce assumption. Like I said earlier when I used to purge my evo with the filter off it took at least 28OZ coming out of filter housing before I got clean oil. Maybe what I do is overkill to some  but for what the extra oil and filter cost me it is no biggie to feel better about my oil. Also the POS reference is unprofessional. CAHDBIKER

[cahdbiker]

Gotta call BS on that one.  You could not sump something around 25% of total volume and still have the engine running.  The system would not allow it.  Seeing an overall mix that didn't look pristine?  Ah, maybe.  But you're talking ounces of remaining oil; not a quart.  That's why it's just no big deal.

Even if you are correct the fact that dirty oil comes out until a quart is flushed means a lot. Watch the scavenger puck video. It is enlightening. CAHDBIKER

[Twolanerider]

Even if you are correct the fact that dirty oil comes out until a quart is flushed means a lot. Watch the scavenger puck video. It is enlightening. CAHDBIKER

It is what a friend of mine who works on infomercials calls, "a good visual" or, more to the point, advertising (propaganda).  And it certainly is.  When considering the totality of the system, however, while the image or video might tell a story it does not tell the whole story. 

[skratch]

Like I said earlier when I used to purge my evo with the filter off it took at least 28OZ coming out of filter housing before I got clean oil. Maybe what I do is overkill to some  but for what the extra oil and filter cost me it is no biggie to feel better about my oil. Also the POS reference is unprofessional.

first, like i said before, it's gonna take that long to get clean looking oil out of your system, just because it doesn't take much dirty residual oil to make the clean look dirty.

and secondly, jerry was being facetious when he said 'pos' because there couldn't be that much residual oil left in the sump without there being something drastically wrong.  he wasn't really saying that your bike was a pos.....  even i got that one.

thirdly, if it makes you happy, you do you.

[cahdbiker]

first, like i said before, it's gonna take that long to get clean looking oil out of your system, just because it doesn't take much dirty residual oil to make the clean look dirty.

and secondly, jerry was being facetious when he said 'pos' because there couldn't be that much residual oil left in the sump without there being something drastically wrong.  he wasn't really saying that your bike was a pos.....  even i got that one.

thirdly, if it makes you happy, you do you.

Hi Guys, I appreciate the input regarding this topic +/-. Ride safe. CAHDBIKER

[muddypaws]

For the past 25 years I have put over 500,000 miles on 8 Harleys and change the oil every 5000 miles and have never had an oil related problem. If you got the time and the money enjoy changing it whenever you want if it makes you feel good.

[muddypaws]

For the past 25 years I have put over 500,000 miles on 8 Harleys and change the oil every 5000 miles and have never had an oil related problem. If you got the time and the money enjoy changing it whenever you want if it makes you feel good.

[Twolanerider]

If I could find a woman that would enjoy bathing in the old oil (or, even better, new oil) and having it all rubbed in to make the skin more silky I'd mar.....


Wait, never mind, wrong site.  Never mind.

[iski]

^
You are past the time for a needed oil change.

 

[Ironhorse]

That oil scavenger system looks like a good device. For me the only issue is that it relies on the pipe hole to pump out. That's the one I have the oil temp pick up in. I'm not sure I want to be undoing that every time I change oil.