[Common, Brake fluid]
What are the DOT3, DOT4, DOT5.1 brake fluid differences?
Brake fluids are categorized by applications, fluid nature, color, dry boiling point and wet boiling point. Most commonly used brake fluids are DOT3 and DOT4. The brake fluid comparison table offers the differences among brake fluids.
Type | Nature | Wet Boil Temp | Color | Applications |
|---|---|---|---|---|
DOT 3 | Glycol | 284F/ 140C | Colorless to amber | Passenger cars and trucks |
DOT 4 | Glycol | 311F/ 155C | Colorless to amber | Passenger cars and trucks |
DOT 5 | Silicone | 356F/ 180C | Purple | Military and show vehicles |
DOT 5.1 | Glycol | 374F/ 190C | Colorless to amber | Racing cars |
Wet Boiling Temp is the temperature DOT brake fluid will begin to boil after it has absorbed 3.7% water by volume, Courtesy of What is meant by wet and dry boiling points of brake fluid?.
[Source: AFCO, USDOT] , https://auto.howstuffworks.com/auto-parts/brakes/brake-tests/how-to-check-brake-fluid.htm
References
1. https://www.aa1car.com/library/bfluid.htm
2. https://www.aa1car.com/library/bfluid1k.pdf
3. https://auto.howstuffworks.com/auto-parts/brakes/brake-tests/how-to-check-brake-fluid.htm
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