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Old 11-15-2012, 09:52 PM   #24
Scooby Specialist
Member#: 276425
Join Date: Mar 2011
Chapter/Region: NWIC
Location: Seattle, WA
2013 335is
Alpine White


Originally Posted by drewvdw View Post
I don't know anything about that stuff, but if its anything as expensive as super blue, go with DOT 5.1
That's not really good advice, if anything he should be fine with DOT 4.

DOT 5.1: This brake fluid has a borate ester base. It is clear or light amber in color. Its dry boiling point is 500 minimum and wet boiling point of 356 minimum. It is used in severe-duty vehicles such as fleets and delivery trucks; towing vehicles, and race cars. It can be mixed with DOT 3 or DOT 4 without damage to the system. It maintains higher boiling point than DOT 3 or DOT 4 fluids due to its higher borate ester content. It is excellent for severe duty applications. The problem with it is that it costs more than other fluids and there is limited availability. It also absorbs moisture out of the air and thereby reduces its boiling point. It can also damage the paint on a vehicle.
Doesn't sound like the smartest option for streets to me.

ATE Super Blue or another DOT 4 is good enough.
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