Lucas Oil shenanigans
Tourer
Joined: Feb 2008
Posts: 436
Likes: 71
Largely correct, I think... The biggest difference in moto oils has to do with a wet clutch which shares oil with the crankcase. There can be other differences as well, some of which relate to a higher RPM range. Neither of these differences should be a concern with a Harley engine, though!
Advanced
Joined: Jun 2016
Posts: 76
Likes: 5
From: San Diego
The biggest argument for using "motorcycle oil" vs "car oil", from my understanding, is that a car uses separate oil to lubricate the engine and transmission. Motorcycle oil supposedly has additives to help lube the tranny gears as the crankcase oil has to lube both.
But having said that, Harley's have a separate oil for the tranny anyway, and I assume you bought the proper tranny oil.......so your good brospeh! You could even use some of that extra oil in the primary if you wanted.
But having said that, Harley's have a separate oil for the tranny anyway, and I assume you bought the proper tranny oil.......so your good brospeh! You could even use some of that extra oil in the primary if you wanted.
Seasoned HDF Member
Joined: Jan 2015
Posts: 15,990
Likes: 7,111
From: Sandy Eggo's North County
Originally Posted by irensby
Should be fine for the crankcase. I imagine the big difference between moto spec oil and the car spec stuff would be a big deal if the clutch in our bikes shared the same oil. Seeing as the primary and motor have individual sumps per se, you should be fine to use the oil you bought in the motor.
Grand HDF Member
Joined: Jul 2016
Posts: 4,384
Likes: 8,742
From: Texas
The biggest argument for using "motorcycle oil" vs "car oil", from my understanding, is that a car uses separate oil to lubricate the engine and transmission. Motorcycle oil supposedly has additives to help lube the tranny gears as the crankcase oil has to lube both.
But having said that, Harley's have a separate oil for the tranny anyway, and I assume you bought the proper tranny oil.......so your good brospeh! You could even use some of that extra oil in the primary if you wanted.
But having said that, Harley's have a separate oil for the tranny anyway, and I assume you bought the proper tranny oil.......so your good brospeh! You could even use some of that extra oil in the primary if you wanted.
Bike oil has zddp for anti-wear - no harm to the clutch
Long as the motor / clutch have separate oiling (HDs) okay to use automotive oil in the motor
In shared oiling systems it kill the clutch
Ghost
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Thread Starter
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Advanced
Joined: May 2015
Posts: 50
Likes: 2
From: Sacile, Italy
thanks for all the replies- i am gonna give it a try in the motor and dump some syn3 i was able to find in the primary. Got some new screws for the derby cover so i am about to finish it up...
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From: Glendale AZ
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