Ok to mix, but draining as much as you can by the master cly reservoir, then moving to a high quality fluid will surely be best process. I've switched to Pentosin DOT 4LV, PEN-1224116 (retails for around $15 (1 Liter) Product Information DOT 4 brake fluid Low viscosity DOT4 brake fluid Pentosin DOT 4 LV is a special brake fluid of highest DOT 4 performance levels and extremely low viscosity at cold temperatures. It offers safety against vapor lock; it has excellent resistance to absorbing and retaining water and provides superior corrosion resistance. Pentosin DOT 4 LV Brake Fluid is ideal for all modern vehicles with ESP and ABS. DOT 4 LV can be used in all vehicles that require DOT 4 fluid. Product attributes: - Appearance: Yellow & Clear - Density at 20°C: 1062 kg/m³ - Kinematic viscosity at 40°C: 6.4 mm²/s - Kinematic viscosity at -40°C: < 700 mm²/s - Melting point: >-50°C/ >-58°F - Flash point: >130°C/ >266°F - Ignition temperature: >200°C/ >392°F - Boiling point: >265°C/ >509°F - Wet boiling point: >170°C/ >338°F - pH Value: Slightly alkaline Very pleased with performance, and subsequent fluid flushes are much cleaner. If you drive it the mountains, or heavy traffic in warmer climates, you may want to consider ATE-706202, also DOT4 Typ 200 specifications: Dry boiling point: 280°C (536°F) Wet boiling point: 198°C (388°F) Recommended change interval: Up to 3 years (personally I'd never go more than 2 years) Modern brake fluids are glycol based and comply with DOT3, DOT4, or DOT5.1 standards. Glycol based fluids are hygroscopic which means they absorb moisture. Additives in brake fluids are designed to prevent corrosion caused by moisture. Simply put, the longer you keep brake fluid in your system the higher its moisture content will become. A higher moisture content decreases the boiling point of your brake fluid and increases the temperature at which the fluid will freeze. Jack
-----Original Message----- From: Vanagon Mailing List [mailto:vanagon@gerry.vanagon.com] On Behalf Of Mike Griffiths Sent: Tuesday, February 1, 2022 4:53 PM To: vanagon@GERRY.VANAGON.COM Subject: Brake fluid Can you mix DOT 3 and 4? |
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