None of the collectors I have ever used cared. Oil is oil, apparently. The shop I used to run had a single collection tank in the back for all oils, be they gear, motor, transmission, or hydraulic.

I'd suggest just calling the location you want to take the stuff to and asking them.

__________________
- K.C.Adams

'77 300D Euro Delivery
OM617 turbo / 4-speed swap
404 Milanbraun Metallic / 134 Dattel MB-Tex

Current status:
* Undergoing body work

My '77 300D progress thread