The Different Colors of Coolant When you decide to change your antifreeze/coolant liquid make sure you replace it with the same color coolant or that your car is compatible with other colors (see owner manual). When changing the coolant, it is best to drain it all and then top off with water/distilled water, start the engine and let it circulate completely and then drain again. Mazda Coolant FL22 0000-77-508E-20 | Priority Mazda Parts 0000-77-508E-20 - Mazda Coolant FL22. Welcome to Priority Mazda of Tysons Corner Virginia, an authorized Mazda dealer in Northern Virginia just outside of Washington D.C. Mazda 3 OE Engine Coolant - Best OE Engine Coolant Parts Order Mazda 3 OE Engine Coolant online today. Free Same Day Store Pickup. Check out free battery charging and engine diagnostic testing while you are in store. Mazda 3 Owners Manual - Engine Coolant - Owner Maintenance The coolant should be at full in the radiator and between the F and L marks on the coolant reservoir when the engine is cool. If it is at or near L, add enough coolant to the coolant reservoir to provide freezing and corrosion protection and to bring the level to F. Securely tighten the coolant reservoir tank cap after adding coolant.