We understand that outboard motors face an entirely different set of concerns than automobile engines. Marine engines are significantly more prone to rust than automobile engines, leading to uncontrolled wear and premature engine failure. And unlike most automobiles, the outboard duty-cycle frequently involves a combination of full throttle operation and extended idle times, rather than a variable mix of more moderate engine speeds. Meanwhile, a virtually unlimited supply of water is available to keep engine operating temperatures low. The vertical crankshaft orientation of outboard engines places much higher stress on the engine oil as compared to automotive engines.