Oil leaking from an automobile may have numerous sources, and many car owners overlook the shocks as a possible culprit. Shocks use oil to dampen the movements of the vehicle, and this function can sometimes lead to a leak.
Most automobile suspensions use struts on the front wheels of the vehicle and shocks on the rear. Shocks will leak oil just inside the rear wheels of the vehicle. Struts also use oil and may also leak. Oil leaking from a shock may run down the shock or drip onto other suspension components or the vehicle's frame.
To locate the leak, wipe away any dirt or grime from the shock. After cleaning, drive the vehicle and recheck the shock for fresh oil. A leaking shock will also work less effectively. You can check its functionality by shoving down and then releasing the corner of the vehicle with the suspect shock. If the shock is working properly, the car will settle back to the original position without bouncing.
A leaking shock has either a corroded body or a failed seal. In either case the shock will require replacement. Shocks should be replaced in pairs, even if only one side has failed. The result of replacing both shocks at once will be an even amount of suspension support on each side of the vehicle.
