I went to pick up a bottle of power steering fluid at my local NAPA and all they had was Pentosin CHF 202. The bottle says it can be mixed with 11 S but it didn't give any indications about its compatibility otherwise.
Since I was only topping off, I was too worried. I bought it.

Anyone know anything about this stuff? Is it 100% interchangeable with 11 S?

 

I remember seeing this when I did mine last year. Don't remember what the exact specs were from then, but I do remember finding 202 cheaper and thought about using it. After deliberation I decided to just go with the 11S for a few dollars more and noting that the PS cap says 11S on it. I do also remember finding another company besides Pentosin that made an 11S, but it was no cheaper than the NAPA Pentosin option. Maybe NAPA can order you some 11S if they don't stock it at your location.