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Road Warrior
Joined: May 2008
Posts: 1,955
Likes: 6
From: Little Rock
thatll work! I prefer mobil 1 20w50 in the motor and primary.., and amsoil severe gear in the tranny,,,
Road Warrior
Joined: Apr 2010
Posts: 1,403
Likes: 72
From: North Dakota
If you are curious, H-D Formula+ is also known as Citgo 10W-40 (thank you Hugo Chavez).
Cruiser
Joined: Jun 2007
Posts: 156
Likes: 11
From: Central WA. state
Harley oil is provided to Harley by the lowest bidder. Synthetic oil is over rated, the ROI has NOT been proven. That being said, I've used plenty of syn. oil. In short, use quality oils and change per manufacturer's recommendations. Outside of that, unless you have proof from an unbiased source that brand X or type Y is soooo much better than Delo 400 or Castrol in your bike/car/whatever, you have nothing to worry about. I think oil weight is important though. Again, per manfs. recommendation.
PS: These oil threads are great entertainment. No offense to the OP, really.
PS: These oil threads are great entertainment. No offense to the OP, really.
Elite HDF Member
Joined: Apr 2010
Posts: 4,990
Likes: 9
From: Marina del Rey
Seasoned HDF Member
Joined: Feb 2009
Posts: 5,642
Likes: 1,985
From: Cleveland Zoo
Using the same oil for the trans and primary does not make sense to me, they are compleatly different applications. Try the search function, oil has been gone over before.
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