Specialist – Diesel noise and vibration reducer Wynn’s Specialist Noise and Vibration Reducer is a unique product formulated with a special blend of chemicals by our Research and Development Team. It has undergone extensive testing to ensure driver satisfaction, most importantly targeting the problem of diesel engine noise and vibrations resulting from inefficient combustion, one of the highest-ranking customer pain points. - Reduces engine noise and vibration. - Reduces engine stuttering and hesitation. - Enhanced driver comfort and experience. - Raises diesel cetane number to further enhance combustion. - Immediate action in one tank.