Extend the effective temperature range of your cooling system. Most Jaguar cooling systems are barely adequate for American driving. By adding Water Wetter weve seen systems operate 5-10 cooler and enjoy superior corrosion protection in conventional glycol-based coolant than without. One 12 oz. bottle treats 12-16 quarts of coolant. Advised to replenish every 15,000 miles. Used by XKs in all race applications.