One (1) qt./32oz. synthetic blend 4-stroke oil Maintains its viscosity Protects against varnish buildup and sludge formation Exceeds the rust protection requirements for NMMA certification Brand new, genuine Mercury Marine/Mercruiser Synthetic Blend 4-Stroke Oil. This is a factory original equipment part, not aftermarket. Fits: Recommended for use in all Mercury Racing four‑stroke engines including: FormulaRace and Verado outboards and 525 EFI through 1650 sterndrives..