How to Add Coolant: Infiniti G37 (1985-2013) - 2012 Click to view0:13Adding engine coolant (also known as antifreeze) to your 2012 Infiniti G37 is pretty easy. Engine coolant circulates through your engine to keep it cool in the summer but won't freeze in the winter. Make sure to check your engine when it is cold for an accurate reading. Infiniti G37 OE Engine Coolant - autozone Order Infiniti G37 OE Engine Coolant online today. Free Same Day Store Pickup. Check out free battery charging and engine diagnostic testing while you are in store.