Quote:
Originally Posted by ChuckG
You need to use up the fluid in the secondary tank because it starts to go bad after a year or so.
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Old post, but if the person you quoted is filling the passive tank, then the active tank is being filled with fresh fluid. The passive tank is the one that should be filled every oil change, at least.
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8/2011 X5 xDrive35d Sport, Black Sapphire Metallic, Black Nevada Leather, Fine Burr Walnut Trim
2/2001 M5, Jet Black, Exclusive Complete Black Walk Nappa Point Heritage Leather, Black Cubic Trim
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