Mineral Oil vs DOT Brake Fluid: What’s the Difference?
Bottom line: Use mineral oil only if your bike or car was designed for it; otherwise stick with DOT brake fluid. Mixing the two can ruin seals and reduce braking performance.
Mineral Oil vs DOT Brake Fluid: Key Differences and Which One to Use
Image: Mineral Oil vs DOT Brake Fluid: Key Differences and Which One to Use – Performance Comparison and Specifications
Composition & Looks (Design & Looks)
Mineral oil is a clear, petroleum‑based fluid that repels water. It looks like a light oil and feels slick to the touch. DOT fluids (DOT 3, DOT 4, DOT 5.1) are glycol‑based, slightly amber, and absorb moisture from the air over time.
Performance & Compatibility (Performance & Mileage)
Because mineral oil doesn’t soak up water, its boiling point stays steady, but it can’t handle the high temperatures of modern disc brakes. DOT fluids are engineered to tolerate higher heat, but they become corrosive as they pick up moisture, so they need regular replacement.
Cost & Alternatives (Price & Rivals)
Both fluids are affordable, yet the long‑term cost of DOT fluid can be higher because you’ll change it more often. Mineral oil lasts longer in a sealed system, but you’ll be limited to bikes or older cars that specifically call for it.
| Engine | Mileage | Price | Top Features |
|---|---|---|---|
| Mineral Oil | – | $10‑$15 / L | Hydrophobic, low corrosion, used in many bike brake kits |
| DOT 3/4/5.1 | – | $8‑$12 / L | High boiling point, hygroscopic, OEM standard for most cars |
FAQ
- Can I use mineral oil in a car that originally had DOT fluid? No. The seals are designed for glycol‑based fluid; mineral oil can cause leaks and soft pedal feel.
- How often should I replace DOT brake fluid? Every 2 years or 24 months is a good rule, especially in humid climates.
- Is mineral oil better for high‑performance riding? Not usually. High‑heat disc brakes benefit from DOT fluid’s higher boiling point.
Got a personal experience with brake fluid swaps? Drop a comment below – we love hearing your stories!
Source: Read Official News
