[200q20v] Hyd. Oil

[C1J1Miller at aol.com]

<< Anyone ever substitute a version of our hydraulic oil with the designation
S61.61? I got a bottle along with a can of 11S in a recent order.   The
S61.61 says meets Bentley specs etc., also a German product as well, and not
a whale oil by product.  
 thanks, Gregg
 >>

No, sorry.  This is a common Audi thread, but I don't understand why.  The correct Pentosin runs about $12 a quart, and the system holds about a quart.  If you're leaking enough to make that too expensive, fix the leak.
Why test if your new fluid is compatible with various seals and leftover old fluid, to save a couple bucks per year?  What if it causes damage?  
Chris