To see or use oars in your dream signify control over your emotions. You are able to navigate through life based on the lessons and skills you have learned. If you are rowing energetically, then it suggests that you need to approach some situation with more aggression and determination.
To dream that you are paddling with one oar indicates that you are going around in circles and headed nowhere. You need help in some situation or matter. Alternatively, it suggests that you are missing a partner in life. If you lose an oar, then it suggests that you have lost your groove or have taken something for granted.