Which of these brake fluid types is silicone based? a. DOT3 b. DOT5 c. DOT5.1 d. DOT 4

The correct answer is b. DOT5.DOT5 brake fluid is silicone-based, while DOT3, DOT5.1, and DOT4 brake fluids are glycol-based. Silicone-based brake fluid, such as DOT5, has a higher boiling point and is less likely to absorb moisture compared to glycol-based brake fluids. This makes it more suitable for use in high-performance or racing vehicles where braking temperatures can reach higher levels. However, it's important to note that DOT5 brake fluid is not compatible with glycol-based brake fluids, so it's crucial to use the correct type of brake fluid for your vehicle's braking system.