blue recovery unit oil replacement??

I have an old RRTI RRU30 recovery unit that I need to change the oil in. It says use 3GS compressor oil. Can't find it. What kind of oil you guys use?
Thanks
Greg

I think I used zerol 200 in mine without problems.

Unit was retired long time ago. Memory is fuzzy.

RRU30, slow but reliable:cheers:. I used 3GS in mine.


Johnstone Supply lists the 3GS Nu-Calgon and Suniso brands in their catalog.

Any 150 viscosity Mineral Refrigeration Oil should work fine.

NuCalgon C-3s.......

X-Reference attached

You still using big blue. Wanna buy mine? It's still in the box.