Mercury Verado Racing Oil - 25W-50 Synthetic Blend - Gallon - 92-8M0078014Recommended for use in all Mercury Racing four stroke engines including: Verado outboards, FormulaRace, and 525 EFI through 1650 sterndrives. Maximum protection is essential when pushing your engine to the limit. Racing, tow sports, and fishing applications require your engine to operate under extreme conditions. Operating at high engine output and high temperatures, or alternating between periods of high RPMS and throttling down to low RPMs or idle