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Does Power Steering Fluid have an expiration date?

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  • Does Power Steering Fluid have an expiration date?

    LOL. Don't want to sound stupid but I found a full new bottle in the attic and my power steering fluid in the engine has already turned black. I was considering changing it but don't know if the new one will be any good. It's made by "Gunk."

  • #2
    Re: Does Power Steering Fluid have an expiration date?

    I know heat breaks it down, not sure about age though. Brake fluid is what, 4 bucks. I'd toss it and buy some fresh stuff.
    Alex C.

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    • #3
      Re: Does Power Steering Fluid have an expiration date?

      Normally they just require topping up unless there is a problem.

      I had to add a tiny amount just to bring it back up to level after 15 years.I went to the Honda garage to do this and they didn't charge anything.Check that the Gunk is compatible.I'm not sure about any DOT ratings for PSF?

      I only know about turning the wheels from side to side with the engine off,to bleed off any air...but don't know about replacing the fluid.

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      • #4
        Re: Does Power Steering Fluid have an expiration date?

        It's not a stupid question at all! I would not recommend using it. From what I've heard from several mechanics/old timers that trained me early on is that old canisters of power steering/brake fluid tend to absorb moisture from the air. The same goes for a recently open bottle of fluid. It's best to use them immediately after opening or at least soon after.

        It is also true what Black150 is saying. Heat breaks down fluids and 15 years of hot California Summers in a scorching attic would not leave anything suitable for use in your car. I suggest picking up a new bottle over the potential damage to your vehicle.

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