🚗 Rev up your engine's potential with Marvel Mystery Oil! Defend against oil breakdown in extreme temperatures. Prevent annoying valve sticking and clatter for a quieter ride. Say goodbye to harmful build-up and hello to longevity. Unlock superior fuel economy and save at the pump! Experience cleaner, smoother engine performance. Fuel economy boost Extreme temp protection Injector cleaning power Marvel Mystery Oil CD 2 MM12R is a 16 oz. fuel additive designed to enhance fuel economy, clean fuel injectors and carburetors, and prevent harmful varnish and gum build-up. It also protects against valve sticking and oil breakdown in extreme temperatures, ensuring your engine runs smoothly and efficiently.