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Brake fluid info

What are the brake dot types?

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DOT3 DOT3 brake fluid is the "conventional" brake fluid used in most vehicles. One of the most familiar brands is "Prestone." Advantages: * DOT3 fluid is inexpensive, and available at most gas stations, department stores, and any auto parts store. Disadvantages: * DOT3 will damage natural rubber brake seals and should not be used in any vehicle suspected of having natural rubber seals * DOT3 fluid eats paint! * DOT3 fluid absorbs water very readily. (This is often referred to as being hydroscopic.) As such, once a container of DOT3 has been opened, it should not be stored for periods much longer than a week before use. Since DOT3 fluid absorbs water, any moisture absorbed by the fluid can encourage corrosion in the brake lines and cylinders. DOT4 DOT4 brake fluid is the brake fluid suggested for use in late model vehicles. Advantages: * DOT4 fluid is available at most auto parts stores, and at some (but not all) gas stations or department stores. * DOT4 fluid does not absorb water as readily as DOT3 fluid. * DOT4 fluid has a higher boiling point than DOT3 fluid, making it more suitable for high performance applications where the brake systems are expected to get hot. Disadvantages: * DOT4 fluid eats paint! Small leaks around the master cylinder will eventually dissolve away the paint on your bodywork in the general vicinity of the leak. * DOT4 fluid is generally about 50% more expensive than DOT3 fluid. * Since DOT4 fluid still absorbs some water, any moisture absorbed by the fluid can encourage corrosion in the brake lines and cylinders. DOT5 DOT5 brake fluid is also known as "silicone" brake fluid. Advantages: * DOT5 doesn't eat paint. * DOT5 does not absorb water and may be useful where water absorption is a problem. * DOT5 is compatible with all rubber formulations. (See more on this under disadvantages, below.) Disadvantages: * DOT5 does NOT mix with DOT3 or DOT4. Most reported problems with DOT5 are probably due to some degree of mixing with other fluid types. The best way to convert to DOT5 is to totally rebuild the hydraulic system. * Reports of DOT5 causing premature failure of rubber brake parts were more common with early DOT5 formulations. This is thought to be due to improper addition of swelling agents and has been fixed in recent formulations. * Since DOT5 does not absorb water, any moisture in the hydraulic system will "puddle" in one place. This can cause localized corrosion in the hydraulics. Careful bleeding is required to get all of the air out of the system. Small bubbles can form in the fluid that will form large bubbles over time. It may be necessary to do a series of bleeds. * DOT5 is slightly compressible (giving a very slightly soft pedal), and has a lower boiling point than DOT4. * DOT5 is about twice as expensive as DOT4 fluid. It is also difficult to find, generally only available at selected auto parts stores. DOT5.1 DOT5.1 is a relatively new brake fluid that is causing no end of confusion amongst mechanics. The DOT could avoid a lot of confusion by giving this new fluid a different designation. The 5.1 designation could lead one to believe that it's a modification of silicone-based DOT 5 brake fluid. Calling it 4.1 or 6 might have been more appropriate since it's a glycol-based fluid like the DOT 3 and 4 types, not silicone-based like DOT 5 fluid. As far as the basic behavior of 5.1 fluids, they are much like "high performance" DOT4 fluids, rather than traditional DOT5 brake fluids. Advantages: * DOT5.1 provides superior performance over the other brake fluids discussed here. It has a higher boiling point, either dry or wet, than DOT 3 or 4. In fact, its dry boiling point (about 275 degrees C) is almost as high as racing fluid (about 300 degrees C) and 5.1's wet boiling point (about 175 to 200 degrees C) is naturally much higher than racing's (about 145 C). * DOT5.1 is said to be compatible with all rubber formulations. Disadvantages: * DOT5.1 fluids are non-silicone fluids and will absorb water. * DOT5.1 fluids, like DOT3 & DOT4 will eat paint. * DOT 5.1 fluids are difficult to find for sale, typically at very few auto parts stores, mostly limited to "speed shops." * DOT 5.1 will be more expensive than DOT3 or DOT4, and more difficult to find.

Posted on Nov 20, 2008

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SOURCE: 2008 FLHX Street Glide: no problem, just asking what DOT # of brake fluid ...

DOT 4 brake fluid

Posted on Aug 10, 2010

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Can I use DOT 4 brake fluid?


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

Jan 04, 2016 | 2000 Hyundai Elantra

1 Answer

What dot 3 fluid


Dot 3 fuid is a specific type of brake or hydralic clutch fuid. Most manufacturers require you to use a specific brand or make of brake fluid or hydralic clutch fluid when servicing their vehicles, Dot 3 is a type of Brake Fluid use by many.

Oct 07, 2012 | 1995 Isuzu Rodeo

2 Answers

1993 Honda Accord Brake Fluid Type. What type of brake fluid is good for my 1993 Honda Accord - DOT 3 Synthetic or Mineral.


Hi,
Just use a normal DOT-3 brake fluid! Just always check the color and level of the fluid!
If it is dirty( black ) u need to drain the whole system and put in a new DOT-3 brake fluid!

Jun 14, 2011 | 1993 Honda Accord

1 Answer

Type brake fluid Audi 2001 TT


Only use new brake fluid conforming to US standard FMVSS 116 / DOT 4. Genuine Audi / VW brake fluid conforms to this specification.

Example:

tdisline_305.jpg
1 Litre of Genuine VAG brake fluid - to US standard FMVSS 116 / DOT 4 with Improved low temperature viscosity.

Feb 28, 2011 | 2001 Audi TT

1 Answer

What kind of brake fluid do i use for a toyota scion xb 2005


Dot 3 fluid is the factory type, Dot 4 may be used too. The difference is in the boiling point Dot 4 is higher quality, and your brakes will work better if they get super hot with Dot 4, you can mix the two types they are compatible with each other. If you mix 3 and 4 you wont get the full advantages of the Dot 4, but it will improve fluid in the system.

Dec 19, 2010 | 2005 Scion xB

2 Answers

What type of brake fluid does a ford expedition us?


You can find that info on the owner manual and also on the cap of the brake fluid reservoir.

Nov 09, 2010 | 2005 Ford Expedition

2 Answers

What type of brake fluid goes in a 2000 chevrolet silverado


The filler cap and manual both specify DOT 3--"Delco Supreme 11" or equivalent.
------------------------------------------------------------------------------------------------------------------------
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.

Nov 08, 2010 | 2000 Chevrolet Silverado 1500

4 Answers

What type of brake fluid is used in a 2003 PT cruiser


Your vehicle uses DOT 3 brake fluid. You can find DOT 3 brake fluid at any autoparts store. You must use ONLY DOT 3.

Jan 26, 2010 | 2001 Chrysler PT Cruiser

1 Answer

What type of brake fluid should I put in my 07 tribeca? I bought a synthetic DOT 4, but the cap says a DOT 3


You can use either DOT 3 or DOT 4 brake fluid.

Both are compatible but the DOT 4 fluid has the higher boiling point and is the better fluid to use.

(You cannot use the DOT 5 silicone fluid in your vehicle).

Dec 12, 2009 | 2007 Subaru B9 Tribeca

1 Answer

Type of brake fluid for ford transit


Brake and clutch fluid use the same DOT 3 synthetic brake fluid.

Sep 12, 2009 | 2003 Ford E250

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