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?!!
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.
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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