Mixing hydraulic fluids

[qbc3]

I'm channging the hydraulic/transmission fluid in my B2150 HST from UDT to Amsoil Synthetic ATH 05 30 Wt. The front end loader is detached and the cylinders are not fully contracted; i.e., maybe 1/3 of the way extended on the arms and bucket. When I hook up the loader after having changed the fluid in the tractor to synthetic (19 or 20 qts), will the small amount of UDT fluid remaining in the loader and the new synthetic fluid be compatible?

 

[Bird]

Yes, they're compatible; nothing to worry about.

Bird

 

[qbc3]

Changed the transmission fluid to Amsoil. Funny thing, the transmission seems to run a lot quieter.