These products offer unprecedented value with concentration to treat larger fuel volumes at a lower cost.

Red Line 60103 SI-1 Complete Fuel System Cleaner, Cleans and Prevents Corrosion in Fuel Systems, Cleans Injectors, Carburetors, Valve and Combustion Chamber Deposits - 15 Ounce …

Get the best Red Line Oil Fuel System Cleaner products at the right price. Order online or pickup at your local AutoZone store.

Jul 29, 2025 · Maximize the impact of Red Line SI-1 with our expert-backed guide. Learn how much to use, when to apply, and tips for commercial vehicles and daily drivers.

Sep 19, 2014 · PERFORM AND PROTECT: Fuel additive cleans injectors, carburetors, valve and combustion chamber deposits with a powerful, concentrated blend of high-temp and low-temp …

Red Line SI-1 Complete Fuel System Cleaner is a concentrated package of the most powerful high-temperature detergents available to clean gasoline fuel injectors, intake valves, and …

Red Line SI-1's injector and valve detergent is a concentrated package of the most powerful high-temperature detergents available to clean gasoline fuel injectors, intake valves and …

SI-1 Fuel system cleaner - 15 oz, concentrated additive, powerful detergents (not solvent based), one bottle per tank for quick clean up, contains synthetic upper cylinder lube, cleans injectors, …

Clean your fuel system with Red Line SI-1 Complete Fuel System Cleaner. Cleans injectors, carburetors, valve and combustion chamber deposits with a concentrated blend of the most …