👉 Boot fluid, also known as boot grease or boot oil, is a specialized lubricant used in automotive engines to protect critical moving parts, particularly the crankshaft and connecting rods, during startup. It forms a protective barrier that prevents metal-to-metal contact, reducing friction and wear, and helps dissipate heat generated during engine ignition. This fluid is designed to be highly resistant to oxidation and contamination, ensuring long-lasting protection as the engine warms up. Typically, it is applied after the engine has been running for a few minutes to allow it to fully circulate and form a stable film around the engine components.
