The Tunap 157 Engine Interior Cleaner is a professional-grade, highly effective cleaning concentrate designed to thoroughly dissolve disruptive deposits throughout the entire oil and lubrication circuit of internal combustion engines. This powerful formula effectively removes sludge, varnish, and carbon deposits from the engine's interior, ensuring optimal lubrication for all critical components. Regular use of Tunap 157 helps to significantly reduce wear, restore engine performance, and extend the overall service life of both petrol and diesel engines.