Goodridge DOT 4 Performance Racing Brake Fluid

Goodridge DOT 4 Performance Brake Fluid - 500mL

Your brake pedal going soft mid-session is one of the scariest feelings on a track. That's brake fluid boiling - and it happens faster than you think. Goodridge DOT 4 Performance brake fluid has a 269°C dry boiling point, which is about 39°C higher than a standard DOT 4 fluid. That extra thermal headroom is the difference between confident, consistent braking and a spongy pedal on lap three.

Why Brake Fluid Boils (And Why You Should Care)

When you brake hard, your pads and rotors generate serious heat. That heat transfers into the caliper, then into the fluid. Brake fluid is hygroscopic - it pulls moisture from the air over time, and every drop of moisture it absorbs drops its boiling point. A fresh bottle of cheap DOT 4 starts at around 230°C dry. A year-old, moisture-contaminated fill of that same fluid might boil at 155°C. Once fluid boils, it turns to vapor. Vapor compresses. Liquid doesn't. Press the pedal and you're just squeezing a bubble instead of moving fluid through the system. That's your pedal going to the floor.

Goodridge Performance fluid gives you a 269°C dry boiling point and a wet boiling point rated to meet DOT 4 minimums - so even as it absorbs moisture over a season, you've got more margin than you would with a budget fill. If you're doing track days, auto-x, or just driving hard on mountain roads, this is the minimum you should be running.

269°C Dry Boiling Point - What That Actually Means

DOT ratings have minimum boiling point requirements. DOT 4 minimum is 230°C dry and 155°C wet. Goodridge Performance beats the dry minimum by 39°C. On a track, that gap matters - especially late in a long session when your brakes are already heat-soaked. You get more consistent pedal feel, more predictable braking distances, and more confidence going into a heavy braking zone after five laps of hard driving.

Fits DOT 3 and DOT 4 Systems - ABS Included

This fluid works in any hydraulic brake system that calls for DOT 3 or DOT 4 fluid - including ABS, stability control, and electronic brake force distribution systems. Do a full flush when you switch over. Don't just top off your old fluid. Old contaminated fluid mixed with new fluid just contaminates the new stuff. Get it all out. One 500mL bottle is usually enough for most cars with a proper flush, but grab two if you're running a big brake kit or want to be sure.

One hard rule: don't mix this with DOT 5 or any silicone-based fluid. DOT 5 is silicone-based and physically incompatible with glycol-based DOT 3/4 fluids. Mixing them causes the fluid to gel. You don't want that in your brake lines.

Pairs with Goodridge Stainless Brake Lines

If you're already running Goodridge stainless steel brake lines - or if you're thinking about upgrading - this fluid is the natural pairing. Stainless lines don't expand under pressure the way rubber OEM lines do, so you get a firmer pedal. Combine that with high-temp fluid that won't boil out under you, and your whole braking system performs consistently. You don't have to run Goodridge lines to use this fluid. But if you're upgrading your lines anyway, it makes sense to do the whole system right.

What's in the Box

• Goodridge DOT 4 Performance Brake Fluid (500mL bottle)
• 269°C dry boiling point
• Compatible with DOT 3 and DOT 4 braking systems
• Works with ABS, stability control, and all hydraulic brake systems
• Pairs with Goodridge stainless steel brake lines

Important notes: Brake fluid is hygroscopic - it absorbs moisture the second you crack the seal. Use the whole bottle or toss what's left. Don't store a half-open bottle in your garage for next year. If you're tracking your car, change your fluid every season at minimum - many serious track drivers change it every event. And do a complete flush every time. Topping off doesn't cut it.