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 treat every 3000 miles.