NOS performance and cleaning for your fuel injected and carbureted engines. Cleans deposits from fuel injectors, restores lost horsepower, prevents stalling and hesitation and protects against rust and corrosion. It includes a unique blend of Powertane for added performance. Meets Mercedes M102E intake valve cleanliness test and BMW requirement for IVD detergency. One bottle treats one tankful. Recommended every 3000 miles.