I have an old Sullair tow behind screw compressor, powered by a
John Deere diesel engine.

The compressor oil in it appears to be all dirty.

I have a can of 5 gallon of "Kaeser Sigma 460" screw compressor
oil. Would such an oil work in this Sullair screw compressor? How
specialized are those oils?

I would prefer not to spend money buying new screw compressor oil, it
is expensive.

Thanks