Oil viscosity question not brand question
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Cruiser
Joined: Sep 2007
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From: Flowery Branch
Oil viscosity question not brand question
Hello, wondering about viscosity on these new bikes. In modern automobiles there using thinner viscosities and engines are seeing problems. Harley has now gone to 15w 50, and I'm wonder if using thicker oil such as 25w 60, or 10w 60 is better for the motor.
Seasoned HDF Member
Joined: Jan 2008
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From: State of Confusion
just as the automobiles you mention, follow the Manufacturer's Owners Manual requirements / instructions and you can't ever go wrong, they know what's best for their motors ... don't over think this, it really is that simple
Stellar HDF Member
Joined: Aug 2011
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From: Newnan, GA
Check the owners and or the service manual for oil and the temperature ranges for your bike
Seasoned HDF Member
Joined: Mar 2010
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From: Honah Lee
And your probably right. In colder climates, the 15W helps for a few minutes and of course cranking. It stays at 15W only minutes after running.
Now it doesn't actually get thicker, it just doesn't get too thin for the running temperature rating.
It doesn't hurt in a hotter climate. There both 50 .
Put a 100k on it, it will sound a tad better with a straight 60.
Last edited by Jackie Paper; Today at 11:17 AM.
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