XADO Revitalizant® for engine allows to exclude “the initial run-in” after complete overhaul of the engine and to perform perfect adjustment of parts using the motor oil recommended by the manufacturer for the whole service period. XADO Revitalizant® for engine provides perfect adjustment of reinstalled parts. Simultaneously the run-in durability decreases by at least two times and the necessity of motor oil change after “the initial run-in” is eliminated since the metal shavings, inevitably accumulating in the oil from the beginning of the run-in period, help to form a ceramic-metal layer on operating friction surfaces and create optimal expansion gaps within a short period of time. Treatment of engines with XADO Revitalizant® is especially efficient by partial replacement of parts (pistons, piston rings and bushings) without cylinder boring and grinding of crankshaft pins. In this case treatment of an engine with XADO Revitalizant® allows to partially restore worn-out operating surfaces of cylinders and crankshaft pins, as well as to perfectly adjust the reinstalled parts with those that haven’t been replaced during the repair.