5000 One vs. TG5000C

[tincanary]

I learned to steer clear of TSI 321 for ambassadeurs due to migration,.....everywhere on the reel,....including the brakes.

The thing with TSI is that it's a thin film lube.  If it is being applied like a traditional oil, you will get migration, just like with any other low viscosity oil.  The trick is to apply, work it in, and blow out the excess with compressed air.  The brakes on these are designed to run dry, different from Shimano SVS which calls for oil on the friction surface.

Yes, of course.  I would thin the TSI 321 with naphtha so the carrier evaporates and leaves a thin film. Same technique as always,...one drop of oil in the bearing. It still migrated to the brakes.....eventually.

Heck,....the stuff migrates to the outside of the reel.
It migrates to greased items too,....somewhere in the testing documentation it talks about that aspect.

I can't say I've had that happen with TSI because I blow it all away with the air compressor.  With other oils I have, because they don't bond in the same manner as TSI and excess isn't blown out.  Oil migration is dependent on viscosity.  The lower the cSt, the more likely that it will migrate.  TSI 321 is tested at 10 cSt at 40°C, about the same as Singer sewing machine oil.  It's rated ISO VG 10.  321 has no carrier, but the aerosol form, 301 does.