Full synthetic or not in primary ?????

Reply Subscribe

Thread Tools

Search this Thread

Oct 13, 2013 | 10:03 PM

CT-Bagger

Thread Starter

Road Master

Joined: Sep 2010

Posts: 836

Likes: 1

From: Rocky Hill, CT.

Full synthetic or not in primary ?????

Why shouldn't I run 20W-50 Amsoil in my primary???
The MoCo suggests there own non-sythetic lube for the primary which differs from engine oil.
Your feedback please.

Oct 13, 2013 | 10:16 PM

Sprinter7x

Cruiser

Joined: Sep 2012

Posts: 185

Likes: 0

From: Mo.

I tried synthetic in the primary,didn't like it,same with a friend at work,the clutch felt like crap,was slower to grab but when it did it was like all or nothing.-The H-D stuff is good,if you don't want it try some Castrol gtx 20-50,it will work fine.

Oct 13, 2013 | 10:20 PM

ColoFXDC

Tourer

Joined: Aug 2013

Posts: 498

Likes: 0

From: Timbuktu

Use a mixture of boggle timer sand and tooth paste with a 100:1 mixture of water.

Oct 13, 2013 | 10:36 PM

Hulkss

HDF Community Team

Joined: Sep 2013

Posts: 2,386

Likes: 2,379

From: Wisconsin

Amsoil 20-50 works great in engine, transmission, and primary chain case. Been using it for years.

Oct 13, 2013 | 10:48 PM

skratch

Seasoned HDF Member

Joined: Jan 2007

Posts: 20,616

Likes: 4,440

From: anacoco, la

its not necessarily synthetic that you want to avoid, its anything with any friction modifiers in it. they will cause the clutch to slip.

i use shell rotella t in my primary. get it in the gallon jug at advance auto for around $12. that gallon will last you at least 4 primary changes, with some left over. it's jaso rated for wet clutches.

Oct 13, 2013 | 10:59 PM

CT-Bagger

Thread Starter

Road Master

Joined: Sep 2010

Posts: 836

Likes: 1

From: Rocky Hill, CT.

Amsoil recommends 20W-50 synth.

Oct 13, 2013 | 11:03 PM

jakenok

Elite HDF Member

Joined: Nov 2011

Posts: 3,513

Likes: 116

From: OKC

Rotella.

7 Times Harley-Davidson Chucked Tradition Out the Window

Verdad Gallardo

7 Surprising Harley-Davidson Products that Are Not Motorcycles

Verdad Gallardo

8 Best Harley-Davidson Motorcycles Ever

Pouria Savadkouei

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

Oct 13, 2013 | 11:24 PM

2-Piece

Cruiser

Joined: May 2013

Posts: 209

Likes: 0

From: Canada

I've got Rotella T6 full synthetic in mine. No issues and clutch feels fine. I may switch back to Formula + though. I think it might be better for the SE compensator I recently installed.