I just bought a new splitter which requires 3.5 gallons of fluid. I ran a few splits just to look things over. Did the dip stick test after about 20 minutes to see level of fluid. Stick was dry. I figured a brand new filter and hosees had to be purged etc. I have added another2 quarts and still dry stick. My question is...normal for this much fluid to be added for 1st. run? Thanks iin advance fo ryour input.