power steering question

I have a remote fill cannister for my p/s. It does not have a fill level line. What is the general "rule of thumb" for filling these cold???
Thanks

 

anyone?

 

Just under half full. Look at most of the new cars and I think that's what you'll find.

 

boot

 

About half full hot..You can run a little higher level once you get used to the run temp..l

 

Thanks, Seb