Harley Davidson Forums

Touring Models Road King, Road King Custom, Road King Classic, Road Glide, Street Glide, Electra Glide, Electra Glide Classic, and Electra Glide Ultra Classic bikes.
Sponsored by:
Sponsored by:

Syn 3 or no?

Thread Tools
 
Search this Thread
 
Old Mar 26, 2014 | 07:59 PM
Share
  #51  
Radman2006's Avatar
Radman2006
Intermediate
Joined: Feb 2014
Posts: 28
Likes: 1
From: KS
Default
I use Amsoil 20/50 in crank and primary chain. Amsoil 80/90 in tranny. Never had an issue.
 
Reply
0
Old Mar 26, 2014 | 09:11 PM
Share
  #52  
12hdrk's Avatar
12hdrk
Road Warrior
Joined: Dec 2012
Posts: 1,335
Likes: 5
From: CT
Default
Originally Posted by Markk9
You need to learn the API specs....any modern oil spec will exceed those listed.
Probably correct. At least one of those is an older diesel spec. Point is MOCO does not want you to know the gas engine oil spec so you won't use other oil. And they only recommend the diesel for an emergency.
 
Reply
0
Old Mar 26, 2014 | 09:26 PM
Share
  #53  
Retrop's Avatar
Retrop
Outstanding HDF Member
Joined: Nov 2008
Posts: 2,034
Likes: 127
Default
Damned if this hasn't turned into another oil thread. Did not take long either. Ya hoo.
Congratulations everyone. Ride on!
 
Reply
0
Old Mar 26, 2014 | 10:27 PM
Share
  #54  
qtrracer's Avatar
qtrracer
Ultimate HDF Member
Joined: Jan 2008
Posts: 6,532
Likes: 132
From: SoCal
Default
Originally Posted by Markk9
You need to learn the API specs....any modern oil spec will exceed those listed.
Which is it? Either a C rated oil is recommended by Harley Davidson to run the bike on all the time or HD is recommending usage of any oil because any oil is better than a c oil? Or are you going to try to correct me again, smh.
 
Reply
0
Old Mar 27, 2014 | 12:12 AM
Share
  #55  
Hausguy's Avatar
Hausguy
Road Master
Joined: Mar 2013
Posts: 1,151
Likes: 14
From: Seattle
Default
Originally Posted by Retrop
Damned if this hasn't turned into another oil thread. Did not take long either. Ya hoo.
Congratulations everyone. Ride on!
Really? Did you miss the title of this thread? Didn't take long, you're right.
 
Reply
0
Old Mar 27, 2014 | 01:30 AM
Share
  #56  
Hal64hd's Avatar
Hal64hd
Road Master
Veteran: Air Force
Joined: Feb 2007
Posts: 1,161
Likes: 39
From: LOST WAGES
Default
SYN3 is not a true synthetic oil. It is a 60/40 blend of dino oil and synthetic (like the quakerstate blended oils)
 
Reply
0
Old Mar 27, 2014 | 05:15 AM
Share
  #57  
Markk9's Avatar
Markk9
Road Warrior
Joined: Apr 2011
Posts: 1,365
Likes: 9
From: Greensboro, NC
Default
Originally Posted by qtrracer
Which is it? Either a C rated oil is recommended by Harley Davidson to run the bike on all the time or HD is recommending usage of any oil because any oil is better than a c oil? Or are you going to try to correct me again, smh.
Any oil that exceeds the old rating will work...

Is H-D trying to deceive the consumer? Yes.
 
Reply
0
Old Aug 28, 2016 | 05:27 PM
Share
  #58  
timanole's Avatar
timanole
Stage IV
Joined: Dec 2010
Posts: 4
Likes: 0
Default
i have a 02 wide glide and just turned 125,000 miles. I have been using syn3 all these years in all 3 holes. The trouble i'm having recently is that after HD service, I'm good for about 2-3 thousand miles and then I have to add a quart to the engine every 800-1000 miles? Anyone else having this issue?
 
Reply
0
HD Forum Stories

The Best of Harley-Davidson for Lifelong Riders

story-0

7 Times Harley-Davidson Chucked Tradition Out the Window

 Verdad Gallardo
story-1

7 Surprising Harley-Davidson Products that Are Not Motorcycles

 Verdad Gallardo
story-2

8 Best Harley-Davidson Motorcycles Ever

 Pouria Savadkouei
story-3

10 Worst Harley-Davidson Motorcycles Ever

 Pouria Savadkouei
story-4

Killer Custom's Jail Break Is The Breakout That Refused to Blend In

 Verdad Gallardo
story-5

Crazy Bunderbike Build Looks Amazing, But Is It Impossible to Ride?

 Verdad Gallardo
story-6

Harley-Davidson Reveals Super Cool Cafe Racer Concept

 Verdad Gallardo
story-7

Engraved Rebellion: Inside Bundnerbike's Glam Rock II

 Verdad Gallardo
story-8

10 Motorcycles You Should Never Buy

 Joe Kucinski
story-9

10 Things Harley-Davidson Needs to Fix in 2026

 Verdad Gallardo
Old Aug 28, 2016 | 05:59 PM
Share
  #59  
CndUltra95's Avatar
CndUltra95
Road Warrior
Joined: Jul 2006
Posts: 1,302
Likes: 61
From: Near YVR
Default
Originally Posted by escalade6103
I've got a '12 SG and I'm going to be changing all the fluids soon. I was wondering if there's a reason to use the Syn 3 in the primary and trans vs specific primary and trans synthetic fluids
There are plenty of reasons not to use Syn 3 in anything but the crankcase.

Others before me have already spoken and others will follow blindly and disregard those who know.

I am by no means suggesting you are one of those who blindly follow...

Rob
 
Reply
0
Old Aug 28, 2016 | 06:39 PM
Share
  #60  
RickW3's Avatar
RickW3
Cruiser
Joined: Jun 2016
Posts: 140
Likes: 6
From: Metrowest
Default
Syn3 for me. One and done, and only have to change once a year to every other.
 
Reply
0



Advanced Search
Reply Closed Thread Share
Forum Jump

All times are GMT -5. The time now is 07:09 PM.

story-0
7 Times Harley-Davidson Chucked Tradition Out the Window

Slideshow: Harley-Davidson built its reputation on nostalgia, but every so often, the company took a hard left turn into the future.

By Verdad Gallardo | 2026-05-20 11:18:19


VIEW MORE
story-1
7 Surprising Harley-Davidson Products that Are Not Motorcycles

Slideshow: The bar-and-shield logo shows up on far more than motorcycles, some of the company's most unexpected products have nothing to do with riding.

By Verdad Gallardo | 2026-04-29 16:50:35


VIEW MORE
story-2
8 Best Harley-Davidson Motorcycles Ever

Slideshow: Not every Harley gets it right, but these are the ones that genuinely earned their reputation.

By Pouria Savadkouei | 2026-04-15 14:23:21


VIEW MORE
story-3
10 Worst Harley-Davidson Motorcycles Ever

Slideshow: From the troubled AMF years to modern misfires, these bikes earned reputations for reliability issues, questionable engineering, or disappointing performance.

By Pouria Savadkouei | 2026-04-01 20:01:09


VIEW MORE
story-4
Killer Custom's Jail Break Is The Breakout That Refused to Blend In

Slideshow: Killer Custom's "Jail Breaker" build focuses more on stance and visual aggression than mechanical overhaul.

By Verdad Gallardo | 2026-03-18 19:20:32


VIEW MORE
story-5
Crazy Bunderbike Build Looks Amazing, But Is It Impossible to Ride?

Slideshow: The Swiss custom shop has taken a Harley Softail and stretched it into something so long and low that it looks closer to a rolling sculpture than a conventional motorcycle.

By Verdad Gallardo | 2026-03-07 16:15:30


VIEW MORE
story-6
Harley-Davidson Reveals Super Cool Cafe Racer Concept

Slideshow: Harley-Davidson's new RMCR concept revives the café racer formula with modern hardware-and it may be exactly the reset the company needs.

By Verdad Gallardo | 2026-03-04 12:23:37


VIEW MORE
story-7
Engraved Rebellion: Inside Bundnerbike's Glam Rock II

Slideshow: A standard cruiser becomes an intricate metal canvas in the hands of a Swiss custom house known for pushing Harley-Davidson platforms far beyond their factory brief.

By Verdad Gallardo | 2026-02-24 18:19:44


VIEW MORE
story-8
10 Motorcycles You Should Never Buy

Slideshow: There is no shortage of great motorcycles to buy, but we would avoid these ten.

By Joe Kucinski | 2026-02-19 14:50:51


VIEW MORE
story-9
10 Things Harley-Davidson Needs to Fix in 2026

Slideshow: Harley-Davidson's challenges aren't abstract; they show up in dropping shipments, shrinking dealer traffic, and strategic decisions that aren't yet translating into growth.

By Verdad Gallardo | 2026-01-13 18:33:17


VIEW MORE