Red Line SI-1 Fuel System Cleaner 15 oz 4-Pack — Removes Deposits & Prevents Corrosion

Red Line SI-1 is a concentrated fuel system cleaner that removes deposits and helps prevent corrosion across injectors, carburetors, valves and combustion chambers.

Designed for gasoline engines, Red Line 60103 SI-1 Complete Fuel System Cleaner delivers a potent blend of detergents formulated to dissolve gum, varnish and carbon buildup. Each 15-ounce bottle is intended for one tank treatment, restoring spray patterns and improving fuel burn consistency while stabilizing gasoline during storage. This four-pack provides multiple treatments for regular maintenance or a multi-vehicle shop.

How does Red Line SI-1 improve fuel system performance?

SI-1 works by breaking down and suspending fuel deposits that form on injectors, carburetors, intake valves and in combustion chambers. Cleaner components restore correct atomization and airflow, which helps the engine run more smoothly and efficiently.

• Powerful detergents target both high-temperature and low-temperature deposits.
• Restores injector spray pattern and throttle response.
• Helps reduce rough idling and hesitation related to deposit build-up.

Will it prevent corrosion and gasoline degradation?

Red Line SI-1 contains additives that inhibit corrosion inside the fuel system and improve gasoline stability during storage. By limiting oxidation and moisture-related corrosion, the product helps protect metal components and reduces varnish formation over time.

• Stabilizes fuel to slow down oxidation and gum formation.
• Corrosion inhibitors protect internal fuel system metal parts.
• Useful for vehicles in seasonal storage or infrequent use.

How do I use one 15-ounce bottle for best results?

Each 15-ounce bottle is formulated to treat one full gasoline tank for most vehicles—simply pour the bottle into the tank before filling with fuel. For heavily contaminated systems, a second treatment or professional cleaning may be beneficial.

• Use one bottle per tank for routine cleaning and maintenance.
• Add before filling to ensure proper mixing with fuel.
• Follow up treatments as needed for older vehicles with significant deposits.

Is SI-1 compatible with different gasoline engines and fuels?

SI-1 is formulated for use in gasoline engines including multi-port fuel injection, throttle-body injection, and carbureted systems. It is designed to work with standard gasoline and commonly used ethanol blends; always follow manufacturer recommendations for fuel additives.

• Safe for most gasoline-powered cars, trucks, motorcycles, and small engines.
• Effective with regular and reformulated gasolines, including ethanol blends.
• Not intended for diesel engines—use diesel-specific treatments for those systems.

Who this product is for: Red Line SI-1 Complete Fuel System Cleaner is aimed at vehicle owners, mechanics, and fleet managers who want a concentrated, professional-grade additive to tackle injector and carburetor deposits, improve fuel stability, and reduce corrosion risk. The 4-pack suits regular maintenance schedules, multi-vehicle households, or shops that perform routine fuel-system treatments.

Ingredients

Distillates, petroleum, hydrotreated light naphthenic, Oxirane, 2-ethyl-, homopolymer, 2-aminoethylethyl tridecyl ether, branched, Distillates, petroleum, hydrotreated heavy naphthenic, Kerosine, petroleum, hydrodesulfurized,Naphtha, petroleum, hydrodesulfurized heavy