Designed to exceed expectations - Red line complete SI-1 fuel system cleaner treatment for cleaning & preventing corrosion in fuel systems | Perform & protect - Fuel additive cleans injectors, carburetors, valve & combustion chamber deposits with a powerful, concentrated blend of high-temp and low-temp detergents | Efficient fuel burn - Gas treatment that enhances gasoline stability, while reducing the build up of gum and varnish formation | Easy to use - Use one bottle per tank for most effective treatment, additive cleans nearly 100% efficiency in one treatment | Why red line - Established in 1979, red line products perform & protect better than any on the market. No compromises