A dream featuring an oar or the use of oars symbolizes your personal skills and the control of emotions.
If you are rowing with a group of people then this implies that you appreciate the value of team effort.
A dream where you are using one oar only implies that you need to work on collective effort.
To break an oar or have a broken oar suggests that you are experiencing an obstacle in some personal endeavor or a work environment.
To lose your oars or an oar in the dream implies that you are feeling helpless in some aspect of your life.