Changing brake fluid

Except that both brake fluid and antifreeze come in different types made specifically the vehicle they are in. But in a pinch, yes.

Antifreeze as Brake Fluid? : r/MechanicAdvice - Reddit

https://www.reddit.com > comments > aqtiwg > antifree...
Feb 15, 2019 - But think, green antifreeze is ethylene glycol based. Brake fluid is usually glycol based. So, like, while I have no plans to do this, ...

Brake Fluid (diethylene glycol) - Poison Control

https://www.poison.org > articles > brake-fluid
The Bottom Line. Most brake fluids contain diethylene glycol (DEG). DEG has a sweet taste making it attractive to children and pets.

Coolants And Brake Fluids - infinoil1.com

http://infinoil1.com > coolants-and-brake-fluids
DOT 3: This brake fluid is a poly glycol base product. Its dry boiling point (ERBP) is 205°C minimum and wet boiling point (Wet ERBP) is 140°C minimum. It ...
BRAKE FLUID: MINIMUM BOILING POINT ...
DOT 4: 230 Deg C
DOT 5.1: 260 Deg C
DOT 3: 205 Deg C

..

dot 4 brake fluid is suitable to top up all dot specified brake fluids
the dot fluids are glycol based fluids are are used widely in the transport industry
the are controlled standards issue by the department of transport (DOT) your car will not be using dot 5 fluid
the main differences between the dot standards is the boiling points of the fluids
for example dot 3 wet boiling point is 140c-284f
dot 4------------------------------------------155c-311f
dot5--------------------------------------------180c-356f
dot5.1------------------------------------------190c-374f
a brake fluid compatibility chart shows the following
dot 3 with dot 3, dot 4 NOT dot 5 , dot 5.1
dot 4 compatible with dot3 dot4 NOT dot5 , dot 5.1
dot 5 Not Compatible with dot3,dot4, dot5.1
dot5.1 compatible with dot 3,dot4 dot5.1 not compatible with dot5
refe to site epicbleedsolutions.com for references
for any other information as to why boiling points are the main factors and why brake fluid should be changed on a regular basis go google and type in ---brake fluid dot specifications and compatibility--- and there are many informative sites available

A general DOT 3 brake fluid is use in small vehicles

The filler cap and manual both specify DOT 3--"Delco Supreme 11" or equivalent.
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Lets look at what the DOT ratings mean. The table below shows the MINIMUM wet and dry boiling points for DOT 2, 3, 4, and 5 brake fluid in degrees fahrenheit.
DOT 2 DOT 3 DOT 4 DOT 5
Dry Boiling point 374 401 446 500
Wet boiling point 284 311 356

The DOT 2 spec is for drum brakes and is obsolete. If you have any DOT 2 in your garage, throw it away!
DOT 5 is for silicone brake fluid. Silicone brake fluid (DOT 5) should be avoided because it is not compatible with regular brake fluid, it is hard to pour without introducing bubbles and thus results in soft pedal feel, and moisture still gets into your system and will pool in low areas like your calipers and encourage rapid corrosion. STAY AWAY!
That leaves DOT 3 and DOT 4 fluids. These fluids are compatible with each other and may be interchanged or mixed with no ill effects.
I haven't had any problems at that time adding Prestone DOT 4 to the original GM fluid.
Changing BRAKE FLUID is a MUST. Most dealers recomend at 60K scheduled maintenance service.
The industry standard is every 3 to 4 years for DOT 3 and every 2 years for DOT 4 under normal driving conditions.

DOT 3 minimum required, recommend DOT 4 (compatible, DOT4 has higher boiling point).