What's the 2017 mazda 6 coolant type?

The recommended coolant F-TYPEor the 2017 Mazda6 is the proprietary Mazda FL22 type coolant. In its absence, You can use another reputable coolant type; Pentofrost A2 comes highly recommended by some '17 Mazda6 drivers. The most important thing if You're switching to a different type of coolant is to ensure that You don't mix incompatible types. You'll see things like OAT, OET, and HOAT on the coolant's label. If You're not sure what's in Your Mazda6's cooling system -- perhaps, if You bought the vehicle preowned from a private seller -- You may want to consider doing a full drain and fill. This is the best way to ensure that the whole system is filled with an approved coolant from a reputable brand.