The reason I ask is because the Murphy's Law side of me felt like I needed to ask the service manager prior to bringing the bike in for the "free" 1000 mile service. When there was a little hesitation in his reply, even though he gave the right answer, I still felt the need to mention it at the service desk where there was a look of puzzlement on the writer's face. Hopefully the actual mechanics that do the work can tell the difference in a SE and a regular bike and know to use Syn 3 even if it isn't a great product.
So Mobil 1 Vtwin is that much better? It is readily available at Walmart. Can I use it in all three places? I've heard Bel-RAy was good for the transmission. My Fatboy is due pretty soon for its 5000 mile service so I can use it as a guinea pig to try something else.
It never hurts to ask and make sure about what they are doing/going to do.
The vast majority of the membership here uses either Mobil I Vtwin or Amsoil. It is fine in all three holes, but if you prefer using specific products, Redline Shockproof HD Syn in the tranny is good stuff, as is their MTL product in the primary. All of these products exceed required specs for the various applications.
All reports I've ever seen/read on motor oil rate Amsoil and Mobil I Vtwin the highest of anything out there in almost every catagory tested. Many users here have reported lowering of oil temps with just this simple change in fluids, in addition to a quieter running top end, better oil pressure, etc.
I personally run the crankcase fluid 5K between changes of it and the oil filter (I use K&N chrome filters, but there is nothing wrong with the HD), and 10K on the tranny and primary.
If you do not do your own service, it would not hurt to try and insist that they use the products you furnish for the fluid changes, but don't expect a positive response. Responses typically vary from a flat NO; it'll void your warranty (it will NOT do so), blah, blah. But, some dealers will cooperate with your request, no problem, but you will need to bring the fluids to them. My dealer will not use my products, so to avoid getting into a whizzing contest with them over it, I just do all my own work, except for the couple of times I've had a warranty issue. If you get the service manual for your bike, and the SE supplement, have basic hand tools/socket sets, you can easily pay for the tools/manuals with the money you save, plus there is then no doubt in your mind about it being done correctly, and you get to know your bike in the process.