View Poll Results: A poll
Voters: 5066. You may not vote on this poll
What Primary Oil is your Choice
Outstanding HDF Member
Joined: Sep 2011
Posts: 3,255
Likes: 112
From: Florida
Hmmm, I don't know of anyone that runs Shockproof in their primary. I do, however, run Shockproof in my gearbox....works great. Btw, I just run basic 10w-40 Castrol oil in the primary.
Stellar HDF Member
Joined: May 2015
Posts: 2,091
Likes: 304
From: mid Michigan
Road Master
Joined: Apr 2018
Posts: 1,172
Likes: 709
From: Indianapolis
Got it. About an hour after I made this post, I saw another thread that explained the differences in the gear oil/engine oil weights. Learn something every day.... including oil migration (something to watch for I guess).
Advanced
Joined: Apr 2018
Posts: 80
Likes: 13
From: Southwest Virginia
Bought a used Harley Heritage Softail. The previous user used Syn 3. Would it hurt to change to Mobile 1 Synthetic? I have heard some people say that you should stick with the same oil, changing can cause problems? Opinions? I usually stay with the same oil, but Mobile 1 is easier to get where I live.
Stellar HDF Member
Joined: May 2015
Posts: 2,091
Likes: 304
From: mid Michigan
∆ it should be fine. If your worried about it run some ATF in it for few hundred miles to clean it out first
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Seasoned HDF Member
Joined: Apr 2010
Posts: 33,714
Likes: 3,723
From: Connecticut.
Bought a used Harley Heritage Softail. The previous user used Syn 3. Would it hurt to change to Mobile 1 Synthetic? I have heard some people say that you should stick with the same oil, changing can cause problems? Opinions? I usually stay with the same oil, but Mobile 1 is easier to get where I live.
Cruiser
Joined: Dec 2016
Posts: 140
Likes: 25
From: Lake Placid,Fl.
Jcook77...I use Amsoil 20/50 in the engine,amsoil primary Oil in the primary and Amsoil trans fluid in the trany on my 2018 Glide and wifes 2013 Slim.....Seems to work just fine even in the Florida heat....I may try Redline primary in her bike as it cable clutch and finding nuteral in the summer can be trying for her...Others say Belray in primary???