Amsoil vs. Syn3
Amsoil vs. Syn3
I have been using HDSE Syn3 in my '07 FLHRS since my first Service. I am considering using Amsoil in its place. Does anyone have any insight to share with me? I am considering AMSOIL Synthetic20W-50 -what should I put in my Transmission and my Primary? Can anyone suggest a non-HD oil filter?
thanks
davlyo
thanks
davlyo
Cruiser
Joined: Aug 2007
Posts: 165
Likes: 1
From: Cole Camp, MO
RE: Amsoil vs. Syn3
I run AMSOIL 20W-50 in my motor, primary, and transmission.
My bike made a lot of valvetrain noise from the factory, and the transmission would "clunk" into first gear. It's unbelievable how much more quiet it is with this oil.
Amsoil makes a filter for it as well.
My bike made a lot of valvetrain noise from the factory, and the transmission would "clunk" into first gear. It's unbelievable how much more quiet it is with this oil.
Amsoil makes a filter for it as well.
Extreme HDF Member
Joined: May 2005
Posts: 16,656
Likes: 13
From: The Big Easy
Trending Topics
Stellar HDF Member
Joined: Jun 2006
Posts: 2,684
Likes: 87
From:
RE: Amsoil vs. Syn3
I use Mobil 1 Vtwin in the Engine and Primary, Mobil 1 75/90 gear in the tranny but I'd glady replace all 3 with Amsoil (probably still stick to 75/90 gear in tranny) and Redline as well.
You can get Mobil 1 VTwin 20-50 for $8 a quart at Wal-Mart. While it's a few bucks more than standard Mobil1 Syn, it's only 3 quarts in the motor.
You can get Mobil 1 VTwin 20-50 for $8 a quart at Wal-Mart. While it's a few bucks more than standard Mobil1 Syn, it's only 3 quarts in the motor.
HD Forum Stories
The Best of Harley-Davidson for Lifelong Riders
10 Worst Harley-Davidson Motorcycles Ever
Pouria Savadkouei
Killer Custom's Jail Break Is The Breakout That Refused to Blend In
Verdad Gallardo
Crazy Bunderbike Build Looks Amazing, But Is It Impossible to Ride?
Verdad Gallardo
Harley-Davidson Reveals Super Cool Cafe Racer Concept
Verdad Gallardo
Engraved Rebellion: Inside Bundnerbike's Glam Rock II
Verdad Gallardo
10 Motorcycles You Should Never Buy
Joe Kucinski
10 Things Harley-Davidson Needs to Fix in 2026
Verdad Gallardo
Southpaw Super Glide: A Left-Hand-Drive 1979 Harley FXE Built to Fit the Rider
Verdad Gallardo
The Best and Worst Harley-Davidson Moves of 2025
Verdad Gallardo
Cruiser
Joined: Nov 2007
Posts: 134
Likes: 1
From: Millbury, ma
RE: Amsoil vs. Syn3
I am a new Harley owner. Bought a 03 RK classic in December and have not ridden it yet. I have asked 3 different Harley dealers about oil. They all recommended regular vs synthetic. They all said synthetic thins out and results in a noisy engine. I know they are referring to Syn3. Any advise is appreciated.
Road Master
Joined: Mar 2006
Posts: 791
Likes: 0
From: Arizona
RE: Amsoil vs. Syn3
Amsoil synthetic all three holes
Engine: 20w50
Trans: SVG 70w90
Primary: 10w40
Forks: Amsoil Shock Therapy
Engine: 20w50
Trans: SVG 70w90
Primary: 10w40
Forks: Amsoil Shock Therapy
ORIGINAL: davlyo
I have been using HDSE Syn3 in my '07 FLHRS since my first Service. I am considering using Amsoil in its place. Does anyone have any insight to share with me? I am considering AMSOIL Synthetic20W-50 -what should I put in my Transmission and my Primary? Can anyone suggest a non-HD oil filter?
thanks
davlyo
I have been using HDSE Syn3 in my '07 FLHRS since my first Service. I am considering using Amsoil in its place. Does anyone have any insight to share with me? I am considering AMSOIL Synthetic20W-50 -what should I put in my Transmission and my Primary? Can anyone suggest a non-HD oil filter?
thanks
davlyo