I have a Colchester Mascot 1600. It's headstock oil was Shell Telus 27, no longer available.
The requirements are:
Specific Gravity at 20 degrees - 0.870
Flash point closed - 210 degrees Cel., 410 F
Pour point - -29C - -20F
Viscosity Redwood No. 1 70F - 320 secs.
140F - 68 secs.
200F - 41 secs.
Viscosity Engler Degrees 10.5
What are examples of suitable oils? I was thinking maybe a hydraulic AW32?