Flush Power Steering System
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So how often you do it depends on you.
I do it to every car I buy used, I do a complete flush, add good fluid and never change it again.
And remember that you cannot judge the condition of the fluid by the color, you would need to have it tested in a lab.
My work van has over 240,000 miles on it, original power steering fluid and pump and steering box, I'm a delivery driver, the power steering gets a good work out everyday.
So, how often you want to change it depends on you.
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