Oil Purge
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Cruiser
Joined: Jun 2005
Posts: 242
Likes: 0
Oil Purge
I have a 08 Ultra. Everything I read says when you change oil just add 3.5 quarts. Now since the total capacity is 4 quarts that means I have .5 quarts of old oil. When I put in 4 quarts ( new filter) the dip stick shows too much oil. If I go from fossil oil to synthetic, then the synthetic becomes contaminated with fossil oil. If this is correct, how do I completely purge the old oil from the system to prevent contamination?
Road Warrior
Joined: Sep 2007
Posts: 1,314
Likes: 5
RE: Oil Purge
You are really worrying way too much about the pint or less of residual oil. Over time and the next couple changes any old dino oil will work its way out of the system, and it won't hurt a thing in the process.
Banned
Joined: Jan 2006
Posts: 17,265
Likes: 21
From: Los Angeles, CA
RE: Oil Purge
It's a Harley. Don't worry about UNLESS you wnat to learn to a full scavenge type change.
https://www.hdforums.com/m_254963/tm.htm
http://www.roguechopper.com/mm5/merchant.mvc?Screen=PROD&Store_Code=RC&Pro duct_Code=RC120
I don't bother.
https://www.hdforums.com/m_254963/tm.htm
http://www.roguechopper.com/mm5/merchant.mvc?Screen=PROD&Store_Code=RC&Pro duct_Code=RC120
I don't bother.
Outstanding HDF Member
Joined: Jun 2007
Posts: 2,150
Likes: 1
From: Tallahassee, Fl
RE: Oil Purge
Like others have said, the little bit you have still in the system will not hurt a thing. As you are adding oil to the bike check the dipstick and when it's full, it's full, no matter what the book says.
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