5 Gallon Case – Mercury Optimax DFI Outboard Oil 

Give your Mercury or Mariner outboard the protection it deserves with the 5 Gallon Case of Mercury Optimax DFI Outboard Oil, featuring two 2.5-gallon bottles for convenient bulk storage and maintenance. Engineered specifically for OptiMax and DFI (Direct Fuel Injection) 2-stroke engines, this oil delivers industry-leading wear protection, corrosion resistance, and cleaner combustion for maximum engine performance and longevity.

Mercury Optimax is formulated to reduce carbon buildup that can limit acceleration, reduce top-end power, and affect overall engine efficiency. Its advanced synthetic additive package provides superior lubricity and scuff protection—critical for DFI engines that operate under reduced oiling rates and higher temperatures.

Approved for all 2-stroke applications, including Mercury and Mariner OptiMax, DFI outboards, Jet Drive models, and Sport Jet engines.

Key Benefits of Mercury Optimax DFI 2-Stroke Outboard Oil

• Industry-leading wear and corrosion protection

• Minimizes carbon buildup to maintain top speed and throttle response

• Supports peak engine performance and better fuel economy

• Reduces smoke for cleaner, smoother operation

• Synthetic additives enhance lubricity and scuff resistance

• Engineered for the high-heat demands of OptiMax and DFI outboards

• Provides full warranty protection for qualifying Mercury and Mariner engines

This 5-gallon case (two 2.5-gallon bottles) is perfect for frequent boaters, service shops, and high-performance outboards that require consistent, reliable lubrication. Maintain optimal performance, longer engine life, and cleaner running with Mercury’s OEM-approved DFI oil.