Lucas Oil Fuel Injector Cleaner 5.25 oz (12-pack) — Concentrated formula restores throttle response & cleans deposits

Lucas Oil Fuel Injector Cleaner 5.25 oz (pack of 12) is a concentrated fuel-system treatment that cleans injectors and upper-cylinder deposits while lubricating internal fuel-system components.

Designed for use in gasoline engines, this compact bottle delivers a high-concentration formula that targets carbon buildup, varnish and deposits on injectors, intake valves and combustion chambers. It combines detergents and lubricants to help restore throttle response and improve combustion efficiency without requiring disassembly. Sold as a 12-pack, each 5.25-ounce bottle treats multiple tanks depending on the application, making it a practical option for home use, fleet maintenance, and professional shops.

How does this product improve engine performance?

The Lucas Oil formula removes deposits that restrict injector spray patterns and choke intake pathways, helping fuel to atomize more evenly. Better atomization supports more complete combustion, which can improve throttle response and reduce rough idling. Results vary by vehicle condition and prior maintenance.

• Breaks up carbon and varnish on injectors and intake valves
• Helps restore proper spray pattern for efficient atomization
• Reduces hesitation and improves throttle responsiveness

Will this protect fuel pumps and injectors?

Yes—the product includes lubricating additives that coat metal surfaces and help reduce wear on moving parts within pumps and injectors. That protective film can be especially helpful when using low-sulfur or ethanol-blended fuels that may offer less inherent lubrication. Regular maintenance applications help keep parts moving freely and can extend component life.

• Adds lubrication to internal fuel system components
• Neutralizes some low-sulfur fuel issues by supplementing lubrication
• Designed for routine preventive use to minimize wear

How do I use the 5.25 oz bottle for best results?

Each small bottle is formulated to be poured directly into a full tank of gasoline as a treatment dose. Follow the label dosage instructions for tank sizes and repeat intervals; typically one bottle treats a tank, but heavy deposits may need multiple treatments spaced over tank fill-ups. Run the engine for a short drive after adding the treatment to circulate the formula through the system.

• Pour entire 5.25 oz bottle into a full gas tank as directed
• Drive normally to allow formula to pass through injectors and combustion chamber
• Repeat per label guidance for stubborn deposits or preventive maintenance

What practical benefits can I expect after treatment?

Users typically notice smoother idle, crisper throttle response and reduced engine knock related to deposits, though measurable fuel economy gains depend on vehicle and driving habits. The cleaner spray pattern and lubricated internals help combustion run closer to factory design, which may lower some emissions and improve driveability. Keep realistic expectations: severe mechanical issues or clogged fuel filters require professional repair.

• Improved idle smoothness and throttle feel for many vehicles
• Potential for modest MPG improvement after deposits are removed
• Reduced deposit-related hesitation and misfire risk in some cases

Who is this for: Lucas Oil Fuel Injector Cleaner 5.25 oz (pack of 12) suits vehicle owners, small fleets, and service technicians who want a convenient, concentrated injector and upper-cylinder cleaner that doubles as a lubricant. It’s ideal for routine fuel-system maintenance, seasonal tune-ups, or as part of a preventive program to protect pumps and injectors—especially for vehicles that run ethanol blends or low-sulfur fuels. Not a substitute for mechanical repair; for persistent drivability problems consult a technician.