1st December 2011, 01:17
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#11
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Addicted Member (>300 posts)
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I can see this is old, but for when others find this thread. Here's what maintenance guru Mike Miller says in his old school maintenance recs:
Power Steering Fluid
Replace every 30,000 miles. This is a very neglected operating fluid. Almost all BMWs use automatic transmission fluid in the power steering system, except for some E32 7 Series cars, which use Pentosin hydraulic oil. Nothing will balls up the works faster than using one when you should be using the other. Check the sticker on the reservoir, check the owner’s manual, and if you are still confused, take the car to a pro or e-mail me.
It is not necessary to evacuate the entire power steering system. I just open a line down by the pump.
I have had great experience using Red Line Synthetic Power Steering Fluid – 184,000 miles and counting on the original rack and pinion unit and pump on the vehicle I used to test this product. But I would not use it in place of Pentosin hydraulic oil where that product is specified.
Point is, Red Line call is PS fluid but its ATF.
Nice to read that some have used Mobil with no problem. I'm low and need to top off, and can't find Red Line at the big box auto stores.
There is nothing about power steering fluid in the owners manual, not even how to check. Very lame, BMW.
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Last edited by Edgy36-39; 1st December 2011 at 01:27.
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