In the Corvette Challenge Series, that was known for killing steering systems, we found the use of a Delco PF883 filter (in the return line) and the use of RedLine PS fluid..... made roughly 75-80% of our problems just go away. It was way more temperature resilient than any oterh PS fluid I have ever used, even in the most demanding applications.



A 'good' syn trans fluid would be another choice...... but only if it is compatible with the steering system in consideration....... which would be DexIII. I have been using DexIII in the BMW's steering system for quite some time now with excellent results.