Cycle Care Formulas Safe Clean Silver and Black Engine Cleaner - 22oz. 15022 Cycle Care Safe Clean is specifically formulated for all generations of silver and black motors A safe cleaner, stain remover and degreaser for all motors Safe Clean will not harm any surface water will not harm and is biodegradable Restores silver motors to factory finish appearance Use with confidence to safely dissolve grease, oil, road dirt and stains