12-Oz STP Direct Injection Fuel Injector Cleaner $6.50 w/ Subscribe & Save

12-Oz STP Direct Injection Fuel Injector Cleaner on sale for $6.84 - 5% when you check out via Subscribe & Save = $6.50. Shipping is free w/ Prime or on $35+. One 12 fl oz bottle of STP Complete Fuel System Cleaner for a variety of gasoline engines. This car fuel treatment has 2x the amount of cleaning agents versus leading premium gasoline.