And now at 95,000 miles, not a single problem since I stopped using Harley's junk stators and switched a Cycle Electric stator.

Also, none of my stator failures were attributable to the GL-5 attacking yellow metal. In all 3 cases, the copper wires broke after the winding wire left the final turn on the coil and broke due to the unsupported wire being exposed to excessive vibration. The Cycle Electric stators address this problem by also encasing this area in epoxy.

Believe the internet myth's if you want, I'll stick with scientifically proven facts.

 

To top it off, there are several more stator failures here on this forum where the user never even saw a GL-5 oil. I guess Formula+ eats stators too. Or, you know, it could be the common factor that it's the stator failing and has nothing to do with the oil.

 

Just since we are on the topic of stator failure. I have seen some stuff from Victory that Harley's stators fail because of their location and over heating. They sit right up against one of the hottest parts of the motor and have no method of cooling other than the primary oil. Victory states they don't have that problem, because their stators mount to the primary cover (exact opposite location of the Harley) and are partially cooled by the air flowing over the primary cover. Never found any scientific data proving this, but it is interesting non the less.

 

I switched to the Moble 1 as above and love it. Works better than anything I've used in the past.

 

On another note, has anyone tried Spectro's new STL (Sportster Transmission Lube)?

It's a full synthetic GL-1

http://www.spectro-oils.com/spectro-...eavy-duty-stl/

 

Doesn't look too bad. The only complaint I have would be that it's a 75W-140, which is a little thick on the top end than what is called for in the primary. I typically see big twins use the heavy stuff in transmission only.

Any price info? It's not available locally that I've seen and I can't find reliable results on my phone.

 

I wonder if it's comparable to the old Harley Sport-Trans fluid.

 

The only place I've found it online is spectroshop.com and it's $20/qt. Not cheap by any means

My concern was the weight but i think a 75w140 is between a 20w50 and 20w60 engine oil whereas 75w90 is between a 20w40 and 20w50

 

Dang, that would nearly double the price of my oil change!

Yeah, the heavier stuff just seems out of spec for what is called for. Formula+ is known to be an ~80 weight gear oil, or equivalent to a 40 weight engine oil.

 

+1 - After being told for years that a 75w-140 is too "heavy" a viscosity for the Sporty primary/tranny, I'd want to see more independent testing results. It's certainly out of spec for what Harley calls for.

Not to mention the $$$ price. The cheapest I've found was $18.50/qt plus shipping. That's twice what I pay for a quart of M1, which I can pickup at any local auto parts store.