Went to the dealership for Syn 3 oil for my oil change and he told me the factory is not recommending the use of synthetic oil in the primary. They say it is causing problems with the clutch assembly. They recommend the HD Formula +3 oil now. Has anyone else heard about this problem?

 

Buy primary oil from local indy. why would you use slippery motor oil in a primary.

 

That's contrary to my 2012 Owner's Manual and my 2012 Shop Manual. Maybe this is something new. I recently had my 1000 mile service and the HD dealership put Syn3 in all 3 holes. Nothing was said about this.

 

I use mobil 1 20/50 synthetic in the primary and its smooth as butter.

 

First point - HD dealers are just like the internet, there is a lot of different info depending on where you go and contrary to popular belief all internet and dealer info is not required to be true.

Second point - you can run full syn, in your primary, but honestly no benefit. Me personally, I run regular 20w50 dino, it's cheaper and doesn't need to be any better, it's not under severe use or anything. I do like synthetic in the trans for smoother action and the engine for its heat qualities.

 

my local HD dealer told me they are not putting engine oil in the trans anymore, putting a good gear oil in now.

 

the spec is no longer syn 3 in all 3 holes.

primary + is spec'd for the tranny and primary.

(period)

mike

 

They finally woke up and smelled the coffee I see......Who ever heard of putting engine oil in a transmission??????

 

That's funny cuz Syn3 is a synthetic blend.....I've been using Rotella T6 (jaso MA wet clutch approved) for ever. You cant put good oil in the primary or it wont break down and bring you back for service work.......see what's wrong with that picture?

 

I betcha that blend is Jaso MA oil.