hey Rite i was just wonderin wat everyone thinks is the best fluid 2 put into hydrolics, cus i hav always just used dot 4 brake oil, but i got told that it rots the seals on ur brakes. dont no wether this is true but somebody told me 2 put mineral oil in insed. he also said u can baicly put anything into then. Ive heard of peole puttin water in but i was just wonderin wat peole think is the best fluid 2 use. cheers jake