What kind of fluid do I put in the power steering of a 1994 Audi 90 cs? It's bubbling and acts like it's out and we filled it w what Napa told us to use! Mineral based hydrolic fluid?!!

Asked by Mar 25, 2015 at 06:47 PM about the 1994 Audi 90 CS FWD

Question type: Maintenance & Repair

3 Answers


Consult your owners manual some cars take weird fluids that need to be special for that car.


Sounds like you have a leak or an issue with the pump., I would have it repaired instead of just adding fluid. Use Pentosin CHR 11S. Audi like to call it Hydraulic mineral oil.

1 people found this helpful.

all of audi and vw's power steering is all hydrolic systems so they take a hydrolic mineral oil. Just hit up your local vw or audi dealer and you can get it rather cheap. as for the bubling it sounds like maybe you might have a bad seal in the power steering rack. A car this old it would not really surprise me. Have you ever replaced any of the steering componants before aside from the tie rods and ball joints?

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