Sierra's 10W-30 4 cycle outboard engine oil is formulated to reduce friction and sludge, keeping your boat's outboard running cleaner and more efficiently.
Meets or exceeds the tough requirements of marine 4-Stroke motor manufacturers including Mercury, Yamaha, Johnson-Evinrude, Suzuki and Honda. Sierra 10W-30 outboard oil is guaranteed and backed by Sierra's famous comprehensive warranty, and will not void the original engine manufacturer's warranty. Meets and exceeds quality performance API SJ, CF-2, CH-4 requirements.