SAE 10W is equivalent to ISO 32 

SAE and ISO use two different scales to measure viscosity. SAE 10W is equivalent to ISO 32, SAE 20 is equivalent to ISO 68, and SAE 20 is equivalent to ISO 68. As you can see, there is a bit of a difference between ISO 68 and SAE 30.

 

Hydraulic Oils (ISO & SAE) http://buysinopec.com/collections/hydraulics

 

Replace Hydraulic Oils

http://www.machinerylubrication.com/Read/29715/hydraulic-engine-oils