Several years ago not sure how many years ago. I had a NCSU friend change my cable to hydraulic steer system. After 2 years I had a fluid line get loose and fixed that with no problem. Today while running down the lake I felt a skipping action while making a slight turn. When returning home I checked to find fluid reservoir low and as a result I believed air in the steering lines was cause of my earlier concern today. Enough back ground now my question is using proper procedures I added Hydraulic fluid to the steering column reservoir. I assume, and we all know about assuming, hydraulic fluid is OK instead of steering fluid or does it not make a difference?