The same oil level all the time.
Added protection for engines and transmissions operating at high tilt.
Cleaner oil and longer times between oil changes means less engine wear and less servicing.
The ROS System: Oil is pumped out of the engine from the end of a withdrawal tube and is delivered to the reserve tank. At the same time oil is added to the engine at a slower rate. Oil will rise to the end of the tube and stay there, regardless of tilt or changes in operation. The engine and tank oils are mixed, giving cleaner oil, and longer oil changes.