I noticed my power steering fluid level was a bit low today. It wasn't below the min mark, but the owners manual says to keep it close to the MAX mark. So I went to autozone and found a whole line of power steering fluids. The manual says to use only power steering designated for use with Honda vehicles. It says use of any other fluid will damage the system. Why is this? Is there something particular about the design of a honda power steering system which warrants a special fluid? I did buy the honda fluid, but of course it was more expensive.