Penrite Pro Hydraulic ISO 68 Oil , 1L. RRP $10.99. Suitable for lathe gearboxes, compressors etc
Indus Pro Hydraulic Oils are recommended for use in all types of hydraulic systems using vane, piston or gear pumps, airline lubricators, vacuum pumps, lightly loaded gear sets and bearings (such as headstocks & windmill gears) as well as hydraulic hoists and jacks.
See Penrite site for MSDS and specifications.