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Old 07-08-2011, 09:46 AM   #11
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Join Date: Jul 2009
Location: Rhode Island
Posts: 69
My Ride: 2001 330xi
I did a bit of research on this topic recently. From what I can tell, Prestone Extended Life (about $18 per gallon) meets the standards of BMW. It does not have; silicates, phosphates and is safe for aluminum radiators. The cost between the BMW stuff and Prestone isn't so great, so I'd rather use the BMW stuff. Just remember to mix it with distilled water
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