Which type of fluid should you use in a power steering system?
When flushing a power steering system or replacing a power steering pump you should be thinking, "What type of fluid should I use in my power steering system?" You might think "Power steering fluid, of course!" But not necessarily so. The fact is, OEs recommend many different types of fluids for use in power steering systems. Click on link below to visit this page for a good summary.
http://motorage.search-autoparts.com/motorage/data/articlestandard/motorage/122010/661861/article.pdf