I checked the oil level in my outdrive the other day. It was hardly on the dipstick . I cracked the bolt on the oil fill and nice clean oil ran out. I poured half a quart down the dipstick hole to bring it up to full. Out of curiosity I cracked the drain plug on the lower unit . Out came milky oil . If the drive was taking on water wouldnt it be over full? The outdrive was taken off for an engine replacement and stored in a barn and also stored on a cold concrete floor . The boat hasn't been on the water for almost 3 yrs . Condensation? Any insight is helpful thanks.