Justice Brothers Oil System Cleaner

Justice Brothers Oil System Cleaner – OSC-9P

Deep-Clean Your Engine for Maximum Performance and Longevity

Restore your engine’s health and efficiency with Justice Brothers Oil System Cleaner, now available at NorCal Diesel Performance. Specially formulated to tackle the toughest internal engine deposits, this professional-grade cleaner removes sludge, gum, and varnish while neutralizing harmful acids and cleaning vital engine components. Trusted by mechanics and diesel owners alike, it’s the ideal solution for maintaining peak performance in Ford Powerstroke, Dodge Cummins, Chevy/GMC Duramax, and other diesel or gasoline engines.

Key Features & Benefits

• Removes Sludge, Gum & Varnish: Breaks down and eliminates harmful deposits that rob your engine of power and efficiency.

• Cleans Internally: Circulates through the oil system to clean engine internals, valves, and hydraulic valve filters for a thorough refresh.

• Neutralizes Engine Acids: Protects against internal corrosion by neutralizing acids formed during combustion.

• Cleans PCV Valves by Vapor Action: Effectively cleans anti-smog (PCV) valves, helping maintain proper emissions and engine breathing.

• Contains JB Metal Conditioner®: Bonds to metal surfaces for added protection and reduced wear, even after the cleaning process.

• Prepares Engine for Fresh Oil: Ideal before oil changes to ensure your new oil stays cleaner, longer and your engine runs at its best.

How to Use

1. Add the entire contents of the can to your engine oil before your next oil change.

2. Run the engine at idle for 10–15 minutes to allow the cleaner to circulate and break down deposits.

3. Drain the oil and replace the filter as usual, then refill with fresh oil.

Product Details

Vehicle Compatibility

• Ford Powerstroke Diesel (1985–2025, all models)

• Dodge Cummins Diesel (1989–2025, all models)

• Chevy/GMC Duramax Diesel (2001–2025, all models)

• Suitable for all gasoline and diesel engines

Why Choose Justice Brothers Oil System Cleaner?

Justice Brothers is renowned for high-performance automotive chemicals that deliver real results. Their Oil System Cleaner is a favorite among professional shops and diesel owners for its ability to dissolve stubborn sludge and restore engine cleanliness, helping prevent costly repairs and extend engine life.

Order with Confidence

• Fast, flat-rate shipping

• 30-day returns

Give your engine a fresh start—order Justice Brothers Oil System Cleaner today from NorCal Diesel Performance!