ZIC FLUSH is a synthetic flushing oil with a set of effective detergent additives. It is recommended to use for flushing the engine and transmission when switching to ZIC oil after using oils from other manufacturers or when switching from mineral oil to semi-synthetic or synthetic. It is also recommended to use periodically to keep engine and transmission parts clean. Formulated with Yubase's proprietary synthetic base oil used in ZIC lubricants. Helps restore fuel economy, increase engine operating efficiency and reduce harmful emissions.