Lucas Oil High Mileage Fuel Treatment, 5.25 oz (Pack of 6) — cleans injectors, restores power & mileage

If your car has accumulated miles and started to feel less responsive, this fuel treatment targets common performance robbers without using alcohol. Formulated for vehicles with significant mileage, it cleans injectors and intake areas, reduces combustion chamber and valve deposits, and adds lubrication to critical fuel-system parts. It’s oxygen-sensor safe and suitable for modern port-injected engines, making it a straightforward maintenance step when you want to preserve drivability and help reduce emissions.

How does this treatment improve engine performance?

By removing deposits that form on injectors, valves, and combustion chambers, the formula helps restore the smooth flow and correct spray patterns that engines rely on. With cleaner fuel pathways and added lubrication, engines regain responsiveness and can burn fuel more completely, which often translates to improved throttle response and steadier idle.

• Breaks down varnish and carbon buildup on injectors and valves
• Restores more consistent fuel spray and combustion
• Reduces hesitation and rough idling tied to clogged components

Will this product reduce oil contamination and knocking in older cars?

The formula includes lubricants and detergents that help limit fuel-related contamination of engine oil and reduce conditions that can cause knocking. While it doesn’t replace scheduled maintenance, it can lessen fuel dilution of oil and reduce detonation and pinging that sometimes happen in worn engines.

• Lubricates fuel-system parts to protect against wear
• Lessens oil contamination from fuel-related deposits
• Helps prevent engine knock and hesitation during acceleration

Is this safe for modern engines and emission systems?

This Lucas Oil treatment is formulated without alcohol and is labeled oxygen-sensor safe, making it compatible with most modern port-injected systems and emission controls. It can be used as a preventative measure in newer engines to maintain clean flow and protect components without harming sensors.

• No alcohol formula to protect seals and sensors
• Oxygen-sensor safe for use with modern emission controls
• Suitable for preventative maintenance in newer vehicles

How should I use it and how often?

Use one 5.25-ounce bottle as directed for the specified fuel tank size—typically added during a fill-up. For maintenance, follow vehicle-specific intervals or use the treatment during routine service cycles to keep injectors and intake areas clean.

• Add full bottle to the fuel tank according to instructions
• Best used during refueling as part of routine maintenance
• Repeat interval depends on driving conditions and manufacturer guidance

Who is this for: Lucas Oil High Mileage Fuel Treatment is aimed at owners of higher-mileage cars and light trucks who want an easy, non-invasive way to address lost power, rough idling, or reduced fuel economy caused by fuel-system deposits. It also suits drivers of modern port-injected vehicles seeking preventive care for injectors, valves, and oxygen-sensor-equipped emission systems. If you’re maintaining an older engine’s reliability or taking proactive steps to protect a newer one, this pack of six bottles provides multiple treatments for ongoing upkeep.