Wynn’s Engine Flush Professional Formula Wynn’s engine flush will improve compression & clean the engine from power robbing contaminates, whilst protecting the metal surfaces from friction & wear , something only Wynn’s does. Beware of cheap no name bulk type products the vast majority are nothing more than harsh solvent type kerosene products. These products do not have any type of lubricants and detergents to protect your customers vehicle & you can run the risk of engine failure from a blocked pick up due to the solvent breaking off larger particles of sludge & varnish. Buyer beware