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I have not been able to get 3 qts. of oil in mine during normal oil changes. You may encounter dipstick blowout if over filled. It is normal for some oil to be left in the bottom of the crankcase during an oil change. There are various options in here and on the interweb to perform a "clean" oil change.
I was wondering the same thing.
Just did my 1st oil change on my new to me 2010 Fatboy.
Warmed her up good with a 15 minute ride.
Drained the oil bag.
Removed and replaced the filter.
Added 3 qts of oil.
Ran the bike to get the oil through the engine and filter.
Checked the dipstick, right to the top of the full hot mark.
Figured maybe i needed to run it a bit more.
Took it for a short ride, checked again, same thing...
My book also says 3 1/2 qts???
Well it looks like I left about a 36 oz. of oil in the crankcase.
So I pulled 36 oz. more out after the oil change and then put 36 oz. of fresh oil in.
So in short, I left some old oil in but I'm not too worried about it.
Next oil change I'll make sure I run the bike for 10 minutes or so before I drain it.
will be changing oil myself for first time soon, will be switching from dino oil to synthetic... am somewhat concerned about leaving the old oil in the bike... seems I read somewhere that even when done right, there may be as much as 24 ozs of old oil left somewhere in the motor... ive seen the ads for the scavenger, does it work? whats is cost? and should I be concerned about old dino oil mixing with synthetic in the motor?
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