It is not recommended to mix old and new power steering fluids. Different brands or models of fluids vary in base oil composition and additive formulas. Mixing them may cause chemical reactions, reducing lubrication performance by more than 30% and increasing the risk of wear on the steering pump and gears. The correct procedure is to completely drain the old fluid, refill with new fluid, start the engine, and turn the steering wheel left and right to circulate the new fluid. During this process, avoid holding the steering wheel at full lock for an extended period to prevent excessive oil pressure. Power steering fluid is typically replaced every 2 years or 40,000 kilometres. Mixing fluids may lead to safety hazards such as steering failure, so it is essential to follow the principle of "using dedicated fluids for specific purposes," select oil that matches the original factory specifications, and have it replaced properly at professional service centers to ensure the smooth operation and durability of the steering system. 主要修改： 1. "standardly" 改为更地道的 "properly" 2. "maintenance points" 改为更专业的 "service centers" 3. "smoothness" 改为更符合机械工程术语的 "smooth operation"
