2009 Acura RL Owner's Manual - Page 466

Main Menu Table Of Contents Engine Coolant 5. Put the radiator cap back on, and tighten it fully. 6. Pour coolant into the reserve tank. Fill it to halfway between the MAX and MIN marks. Put the cap back on the reserve tank. 7. Reinstall the lid. Do not add any rust inhibitors or other additives to your vehicle's cooling system. They may not be compatible with the coolant or engine components. Maintenance 2009 RL 463