Justice Brothers Engine Oil Supplement

Justice Brothers Engine Oil Supplement – EOS-66P

Boost Your Engine’s Performance and Protection

Experience superior engine protection and smoother performance with the Justice Brothers Engine Oil Supplement, now available at NorCal Diesel Performance. Specially engineered for both gasoline and diesel engines, this advanced oil supplement is trusted by professionals and enthusiasts alike for its proven ability to extend engine life and enhance overall performance.

Key Features & Benefits

• Protects Internal Engine Components: Forms a protective barrier on metal surfaces, reducing wear and extending engine life—even under the most demanding conditions.

• Reduces Friction: Minimizes friction between moving parts, helping your engine run smoother, cooler, and quieter while improving fuel efficiency.

• Prevents Oil Thickening: Maintains oil viscosity, making it ideal for extended oil drain intervals and modern engines with direct injection.

• Reduces Carbon, Gum & Sludge: Keeps your engine cleaner by minimizing harmful deposits, ensuring optimal performance mile after mile.

• Fortifies Oil Qualities: Enhances the protective properties of both synthetic and conventional oils, helping maintain peak engine performance.

• Will Not Void Warranties: Safe for use in new vehicles and will not void manufacturer warranties.

Why Choose Justice Brothers?

Justice Brothers’ proprietary Treats the Metal, Not the Oil® technology delivers protection where it matters most—on your engine’s internal surfaces. Trusted by service professionals and backed by decades of real-world results, this supplement is a smart investment for anyone who wants to maximize engine longevity and reliability.

“I have used every type of additive known to mankind to reduce friction in a high performance engine, and I have found with a 12 month test on Justice Brothers oil additive… it is far superior to anything I have ever used.”
— B.P., Tucson, AZ

Easy Application

• Add one 15 oz. bottle to 4–5 quarts (4–5 liters) of engine oil.

• Can be added at any time, between or during oil changes.

• Do not overfill crankcase.

Perfect For:

• Gasoline and diesel engines

• Vehicles with extended oil change intervals

• Engines requiring extra protection under severe driving conditions

• Gasoline Direct Injection (GDI) engines

Product Details

Order with Confidence!

• 30-day returns

• Fast, flat-rate shipping

Upgrade your engine’s protection today with Justice Brothers Engine Oil Supplement—available now at NorCal Diesel Performance.