Wynn's Internal Engine Cleaner, available in a 30 Fl. Oz (887 ml) size, is expertly formulated to remove sludge, varnish, and harmful deposits from your engine's internal components. By restoring cleanliness, it helps improve engine performance, enhance fuel efficiency, and reduce emissions. Ideal for routine maintenance, this cleaner supports smoother operation and prolongs engine life, making it an essential choice for preserving your vehicles optimal function. Safely Dissolves & Removes Sludge & Varnish. Improves Compression & Reduces oil consumption. Reduces Contamination of new oil.