See signature for type of boat. I have hydraulic steering on the boat. This afternoon it seemed like the steering was slipping when the motor was trimmed all the way down. When I got home I noticed a few drops of oil around the O ring where the shaft comes out next to the motor. There is an oil fill right behind the steering wheel. I assume to get things sterring correctly I need to add oil at the steering wheel fill, but not exactly sure what kind to add. Just plain old hydraulic oil? Haven't had a chance to see if it is just the O ring leaking or the part that holds in in place needs another turn. 