Can sewing machine oil be used as a substitute for brake fluid?
2 Answers
Sewing machine oil cannot be used as a substitute for brake fluid. Otherwise, it may lead to brake failure. Currently, there is no oil that can replace brake fluid, as different oils have different compositions and naturally cannot achieve the original effect of brake fluid. Using other oils as substitutes may not only significantly reduce braking effectiveness but also potentially cause brake failure. Brake fluid, also known as brake oil or hydraulic brake fluid, is made from refined diesel distillates with thickeners and antioxidants. There are three types of brake fluids: mineral oil-based brake fluid, alcohol-based brake fluid, and synthetic brake fluid. Methods for selecting brake fluid: Choose brake fluid produced by reputable manufacturers and opt for well-known brands to ensure quality and minimize the impact of substandard brake fluid on vehicle components. When selecting brake fluid, you can choose oils with higher consumption points at the same price. Brake fluid can be selected by observation. Generally, normal brake fluid is a yellow or dark yellow liquid, resembling honey in appearance. Choose brake fluid with a low freezing point to ensure good fluidity and achieve better braking performance.
I once almost made a similar mistake in my car when a friend suggested trying sewing machine oil. But honestly, that was just asking for trouble. Brake fluid isn't ordinary oil—it's specifically designed for high-pressure systems, enduring extreme heat and pressure during braking, with a boiling point as high as boiling water to prevent bubble formation and brake failure. Sewing machine oil, on the other hand, is just lightweight lubricant with a pitifully low boiling point that vaporizes under heat and contains high moisture content, which can corrode brake lines and seals. If you actually used it, the result wouldn't be a simple repair—you might feel a spongy, unresponsive pedal or complete brake failure, which is downright life-threatening at high speeds. My advice? Never attempt such substitutes. Spend a little money on proper DOT4 or DOT5.1 brake fluid, replace it regularly as recommended in your vehicle's manual, and prioritize safety—that's the worry-free way to go.
