syn 3 dealer says its good in 3 holes ?
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Road Captain
Joined: Jan 2008
Posts: 602
Likes: 0
From: Lake Grove N.Y.
syn 3 dealer says its good in 3 holes ?
I was buying my fluids at my dealer and they wanted to know why I did not want the syn 3 for the tranny and primary.I told them that I heard that harley does not recommend it anymore and they thought I was crazy.They said they would not put it in the screaming eagle bikes if it was not good .I told them that it is not in the screaming eagle bikes and they said I was wrong.HELP!!!!!!!!!
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Road Captain
Joined: Jan 2008
Posts: 602
Likes: 0
From: Lake Grove N.Y.
Thats why im asking .Because I dont know.I listen to the guys on this forum because I trust you guys more then the dealer.No big deal to me cause I change the fluid every 2000 miles
Outstanding HDF Member
Joined: Nov 2008
Posts: 2,864
Likes: 7
From: kansas city,mo
Just busten chops Joker....i run Syn 3 in all 3 and i have not one complaint...shifting actually got smoother when i changed to Syn 3...good luck brother
Road Master
Joined: Apr 2009
Posts: 1,205
Likes: 3
From: Mebane, NC
This has been over many times and you will gets lots of opinions. Harley would not recommend or even sell the Syn3 if it were not OK to use. As a matter of fact any of the brand products will serve you well. It's a personal decision you have to make.
Many use the Syn3 because it's easy to get and they only have to keep one weight on hand. I used to run Syn3 in my bike. That being said, after much reading (and there is alot to read) on the subject I made the decision to go with Amsoil full synthetic. I also decided to go with weight specific products- 20w/50 in the crankcase, 75w/90 in the transmission, and Supershift in the primary. I feel the weight specific products help my bike perform most efficiently. I did this beacuase I feel these products give me superior protection and service. Not to mention my price on the Amsoil is cheaper than the Syn3 by about 1/3.
At the end of the day it often comes down to what you have confidence in. Happy reading!
Many use the Syn3 because it's easy to get and they only have to keep one weight on hand. I used to run Syn3 in my bike. That being said, after much reading (and there is alot to read) on the subject I made the decision to go with Amsoil full synthetic. I also decided to go with weight specific products- 20w/50 in the crankcase, 75w/90 in the transmission, and Supershift in the primary. I feel the weight specific products help my bike perform most efficiently. I did this beacuase I feel these products give me superior protection and service. Not to mention my price on the Amsoil is cheaper than the Syn3 by about 1/3.
At the end of the day it often comes down to what you have confidence in. Happy reading!
Last edited by harleyheaven; Mar 21, 2010 at 10:02 PM.
Club Member
Joined: May 2007
Posts: 145,895
Likes: 821
From: 40 miles Northeast of Indy..
2 of our 3 nearest HD dealer use sny3 in motor. All three use Formual+ in primary.
All three sell royal purple, Bel-ray or Sprectum GL for the 96'' trannys and urge us to use one of them.
U can use what ever U like,,
All three sell royal purple, Bel-ray or Sprectum GL for the 96'' trannys and urge us to use one of them.
U can use what ever U like,,
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Cruiser
Joined: Feb 2010
Posts: 147
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From: Johns Creek, GA
My mechanic told me NOT to use it in all 3. He uses it in the crankcase. Outside of that he uses synthetic oils specifically developed for the application. why would you want to use a 20W50 oil in the gearbox? He also told me that Harley did come out with a TSB or something advising AGAINST using syn3 in all 3 holes. I haven't seen the TSB or whatever it was myself but I trust his word on the subject and personally I am not going to take a chance just to save a buck or two.
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Stellar HDF Member
Joined: Dec 2005
Posts: 3,231
Likes: 106
Syn 3 is not pure synthetic. It's a blend.
I had a 2006 Low Rider I bought brand new. I had them do the first service to check everything and put Syn 3 in all holes.
When it got warm on the way home the motor sounded like rocks in a Prince Albert can, and shifted like it was sick.
I had that stuff out before nightfall. Went back with Mobile V-Twin in the engine and primary and Mobile Synthetic gear lube in the trans.
Some machines take to it like mothers milk. Others like mine choked on it.
I have a 2007 Heritage now, after wrecking the Low Rider, I haven't switched to Synthetic yet but will go with V-Twin when I do.
There are a lot of good synthetics out there to chose from.
I had a 2006 Low Rider I bought brand new. I had them do the first service to check everything and put Syn 3 in all holes.
When it got warm on the way home the motor sounded like rocks in a Prince Albert can, and shifted like it was sick.
I had that stuff out before nightfall. Went back with Mobile V-Twin in the engine and primary and Mobile Synthetic gear lube in the trans.
Some machines take to it like mothers milk. Others like mine choked on it.
I have a 2007 Heritage now, after wrecking the Low Rider, I haven't switched to Synthetic yet but will go with V-Twin when I do.
There are a lot of good synthetics out there to chose from.
Ultimate HDF Member
Joined: Oct 2007
Posts: 5,257
Likes: 6
From: Leander Texas
changing synthetic oil every 2000 miles is not a good thing