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Deze reply is gepost in de afdeling Main Forum in het onderwerp 'welke olie in achterrembak' (ID 47483).
De reply is geschreven door Niek de Wildt (UserID 13667) op 23-1-2008 12:45.

MENGEN KAN!! heb ik nagevraagt en zelf ook gedaan omdat ik moest bijvullen en all1 dot3 had liggen.

dit staat op wikipedia en dot 3 en 4 verschild alleen in droog en nat kookpunt.

bron: http://en.wikipedia.org/wiki/DOT_4

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DOT 4 is one of several designations of brake fluid denoting a particular mixture of chemicals imparting specified ranges of boiling point.

In the United States, all brake fluids must meet federal standard #116. Under this standard there are three Department of Transportation (DOT) minimal specifications for brake fluid. They are DOT 3, DOT 4, and DOT 5.1.

DOT 4, like DOT 3 and DOT 5.1, is a polyethylene glycol-based fluid (contrasted with DOT 5 which is silicone-based). Fluids such as DOT 4 are hygroscopic and will absorb water from the atmosphere. This degrades the fluid's performance by drastically reducing its boiling point. In a passenger car this is not much of an issue, but can be of serious concerns in racecars or motorcycles.

As of 2006, most cars produced in the U.S. use DOT 3 brake fluid.

Boiling points
Minimal boiling points for these specifications are as follows:

Boiling point ranges Dry boiling point Wet boiling point
DOT 3 205°C (401°F) 140°C (284°F)
DOT 4 230°C (446°F) 155°C (311°F)
DOT 5 260°C (500°F) 180°C (356°F)
DOT 5.1 270°C (518°F) 191°C ( 600)

Ingredients
One particular brand of DOT 4 brake fluid lists the following ingredients on its MSDS:

Chemical CAS no Percent
Triethylene glycol 000112-27-6 5-25
Tetraethylene glycol 000112-60-7 5-25
Dibutoxy tetraglycol 000112-98-1 10-50
Tetraethylene glycol diethyl ether 004353-28-0 10-50
Propane, 2-methoxy-1-(2-methoxy-1-methylethoxy)- 089399-28-0 10-50

edit: idd met DOT5 kan je niet mengen!! maar tot nu toe ben ik die nog nooit tege gekomen, kijk gewoon wat er op je dekseltje staat (bij dot4 mag dot3 dus ook)

Dit bericht is gewijzigd door Niek de Wildt op 23-1-2008 om 12:47 uur.