OK kids---in 40 years of riding, have finally figured I would try this here Synthetic oil---talked to a HD mechanic last night, and we figured Amsoil would be good to start with---question is what weigh to use--the motor and primary would naturally be 20/50w--is that the 20/50w High Performance oil??? and the tranny am looking at 75/90w long life gear lube---would this be best for the tranny??? Thanks

 

I use the Amsoil severe gear 75/90 in the tranny, and Amsoil 20/50 HP in the engine and Primary.
I have a good friend that works for an oil analysist company, he runs my analysis about every second change, the Amsoil has always performed and held up perfectly.

 

Gandy your making a wise choice. Yes the 20w50 is the high perf. oil, the product code is MCV. This oil can be run for twice the OEM drain interval if the AMSOIL EAOM134 oil filter is used. This filter is specifically designed for extended drain intervals. The media is 100% synthetic Nano-fiber technology. The filter media is exclusive to AMSOIL. Marginally more expensive than an HD filter, better filtration by leaps and bounds.

For the transmission, MCV is formulated for use in the transmission. It meets the API GL-1 gear lube requirements (No friction modifiers). I currently have MCV in my transmission. However, it is common for SVG 75w90 Severe Gear to be used in the tranny. There is nothing wrong with doing this, however it is over kill. The SVG is an (EP) extreme pressure lubricant. This means the additive package is aggressive on solids like Zink and phospherous. A rule of thumb for lubricants is the more solids a lube has, the slower the speed of the intended components to be lubricated.
In our transmissions, slow speeds are not the case, therefore the solids are not capable of doing there intended job. Its a waste of good money. The FGR synthetic long life lube that you are looking at is more than sufficiant to protect your transmission and less expensive.

At my next transmission drain, I will be installing FGR, I am curious to see if it will quiet the Harley shift clunk more than the MCV.

Hope this helps.

Steve[sm=icon_rock.gif]

 

Thanks ya`ll----Now--where is the best place to purchase Amsoil??? and can ya just order enough for an oil change or does it have to be in cases???

 

Oh hey, Steve---great answer

 

Amsoil
20-50 moter
75-90 trans
10-40 primary.
I stock all 3. Apple Valley,CA

 

Amsoil.com

 

damn sedibiker, couldn't ya whip just a couple more acronyms? MCV, SVG, FGR, and [sm=wtf.gif]

 

I use Formula+ in the primary, I don't bother with any of that fancy stuff for that. I use Amsoil SVG 75/90 in the tranny and Mobil 1 V-twin in the crank (only because my Amsoil connection doesn't stock the 20/50 and I don't want him to stock it just for me)

 

That ain't nothin,you ought to try communicating with my teenagers by text messaging. Those are just AMSOIL product codes

Steve[sm=icon_rock.gif]