Today’s 4-stroke engines burn cleaner and run quieter than their 2-stroke counterparts. But unlike your car, the demands on a 4-stroke outboard require very special oils and oil additives. All Sierra 4-stroke outboard engine oils meet the same tough standards as the OEM engine oil and are FC-W certified by the NMMA, just like the OEM engine oils. Sierra offers many weights and blends of 4-stroke outboard engine oil to meet your particular situation. And just like every quality product that Sierra makes, our outboard engine oils are backed by Sierra’s industry leading warranty.
*The photo shown on this page may not be representative of the actual product.