HD Expert Long Life EXTRA Antifreeze/Coolant Ready-to-Use premium quality. Pre-Diluted Antifreeze/ Coolant that has been tested to be compatible with all automotive and light duty truck antifreeze/ coolant products available in the market today. HD Expert Long Life EXTRA Antifreeze/Coolant is based on Shell’s proprietary hybrid organic acid technology and has been specifically designed for complete mixed use. It can be used in all makes and models of passenger vehicles, light duty and heavy-duty diesel applications. HD Expert Long Life EXTRA Antifreeze/Coolant not only guards against freezing and boil-over, it also provides critical protection against corrosion.