Synthetic Oil For Primary
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Tourer
Joined: Sep 2007
Posts: 354
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From: Dawson Creek, B.C., Canada
Synthetic Oil For Primary
I know it's probably been asked a few times, but what is a good synthetic oil to put in your primary. I'm thinking of putting Mobil 1 V-Twin 20W-50 in the engine, I'm just not sure about the primary. I've heard some rumours of synthetic oils causing clutches to slip, any truth to this. Anyone have any suggetions?
Ultimate HDF Member
Joined: Feb 2008
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From: Escondido, CA
RE: Synthetic Oil For Primary
I used Mobil 1 synthetic but switched to a regular motor oil, 30w and the clutch seems to have a better feel. Many say you are just wasting money using a syn in the primary, especially for the clutch. Some have said they felt slipping with a syn. Harley has a primary oil they recommend, not a syn.
Tourer
Joined: Nov 2007
Posts: 299
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From:
RE: Synthetic Oil For Primary
I put Redline MTL in the primary &\\; Redline Heavy Shockproof in the tranny at the beginning of the summer. Clutch feel is great, runs quiet, &\\; clunk noise when shifting was reeduced. \\;
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FYI - can get the Redline products here:
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http://www.racerpartswholesale.com/category/Oils_And_Brake_Fluid
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FYI - can get the Redline products here:
 \\;
http://www.racerpartswholesale.com/category/Oils_And_Brake_Fluid
May our Moderator Rest in Peace
Joined: Sep 2006
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From: Rochester, NY
RE: Synthetic Oil For Primary
I have used Mobil 1 20/50 for V-Twins in the engine and primary and Mobile 1 75/90 in the tranny with no noticable ill effects. But it does run cooler and shift smoother.
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Ultimate HDF Member
Joined: Nov 2007
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From: NJ
RE: Synthetic Oil For Primary
I've heard those rumors also. \\; Haven't read of any good reason to switch from Formula+ for primary. \\; Others holes, yes. \\; Primary NO.
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Ultimate HDF Member
Joined: Feb 2008
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From: Escondido, CA
RE: Synthetic Oil For Primary
ORIGINAL: wallyn
Harley recommends their syn3 for the primary as well as their other holes. I run regular dino for the primary and mobil 1 for then engine and trans.
Harley recommends their syn3 for the primary as well as their other holes. I run regular dino for the primary and mobil 1 for then engine and trans.
Outstanding HDF Member
Joined: Mar 2007
Posts: 2,881
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From: North Georgia
RE: Synthetic Oil For Primary
I have synthetics in all three holes. Been that way for me since 500 miles on the odometer. \\;Now, over 13,000 miles and no issues or complaints.
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Previously- AMSOil in all three holes, now (last two oil changes), Mobil-1 V-Twin in engine &\\; primary, a stronger Mobil-1 for the tranny.
 \\;
BTW: My dealer is still pushing Syn3 for all three holes. (but my bike has never been to the dealer's service department).
 \\;
Previously- AMSOil in all three holes, now (last two oil changes), Mobil-1 V-Twin in engine &\\; primary, a stronger Mobil-1 for the tranny.
 \\;
BTW: My dealer is still pushing Syn3 for all three holes. (but my bike has never been to the dealer's service department).