Pour-in-Tank EFI Cleaner is made to remove harmful deposits from the injector nozzles. The entire can should be added to the fuel tank when the tank is half full. Helps restore engine power. Helps increase fuel economy. Helps lower emissions. Enhances smooth idle and acceleration. Minimum operating range of -58°F. Active ingredients include surface activator, fatty alcohol, petro naphtha, synthetic oil and organic amine.