I have a 3200 with the 32hp Vanguard big block and the 5400 hydro. Today I when I was checking everything before mowing I saw the hydro tanks looked empty. I checked them both and both tanks were way below the cold mark but they still had some fluid in the bottom. Last time I used it the fluid in both tanks were at cold level. My first thought was a leak but since they are independant units they both wouldn't be low (at the same low level). The unit has 29 hours on it and it's still under warranty and I'm assuming this is not normal or is it, do the hydro units use this much oil????