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castrol multi for foreign also can be used its all a matter of preference! its cheaper than zf! i just used zf on my car because i purchased in a kit
 

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Redline D4 is what I use. Castrol is NOT synthetic, but it is an approved fluid. Redline D4 is synthetic and a high quality transmission fluid that exceeds BMW spec. It's only a few dollars pricier than the the Castrol.
 
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