Motul Auto Cool Optimal Ultra is a concentrated long-life antifreeze that should be mixed with demineralised (soft) water for immediate use as a cooling liquid. It is formulated with monoethylene glycol and utilises Organic Acid Technology (OAT) through a process known as Organic Tech. This product is strongly recommended for all cooling systems, including those in passenger cars, heavy-duty vehicles, construction and agricultural machinery, gardening equipment, ships, and stationary engines.