Kia Sportage OE Engine Coolant - autozone Order Kia Sportage OE Engine Coolant online today. Free Same Day Store Pickup. Check out free battery charging and engine diagnostic testing while you are in store. Kia Sportage: Checking the coolant level - Engine coolant If frequent additions are required, see an authorized Kia dealer for a cooling system inspection. Recommended engine coolant. When adding coolant, use only deionized water or soft water for your vehicle and never mix hard water in the coolant filled at the factory. An improper coolant mixture can result in serious malfunction or engine damage.