When it comes to brake service, using the correct fluid is more critical than many technicians realize. In this Tech Tip Short, Erik Screeden breaks down the differences between DOT 4 brake fluid versus DOT 4 LV, explaining why the distinction matters for today’s advanced braking systems. While both fluids meet DOT 4 boiling point standards, low viscosity brake fluid (ISO 4925 Class 6) is specifically engineered to support fast, precise operation in modern ABS and stability control systems.
The video also highlights why simply checking the reservoir cap isn’t enough and why verifying manufacturer specifications is essential — especially on late-model European and advanced domestic platforms. Beyond fluid selection, Screeden covers best practices for brake fluid moisture and copper testing, helping shops protect critical safety features and prevent costly comebacks.
Want to ensure you’re making the right call in the service bay? Watch the full Tech Tip Short for practical, real-world guidance you can apply today. For more information, visit www.autozonepro.com/brakes.
About the Author
Erik Screeden
Technical and Multimedia Content Director
Erik Screeden is the Technical and Multimedia Content Director for the Vehicle Service & Repair Group. Erik is an ASE Master Automobile Technician with L1, and L4 credentials, who has been in the industry for over 25 years in various capacities. During that time, Screeden was a technician. He started out at a Ford dealership and continued to several independent repair facilities as well as spent time in the specialty aftermarket at a GM-specific performance shop. After his time as a technician came to an end, Screeden transitioned into a role providing scan diagnostic and J2534 tool support. He was then able to parlay his experience as a technician and a support specialist and use that in several technical sales roles.
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