NC Miata Engine Coolant
Coolant Capacity
7.9 qt
7.5 L
Pressure Cap
13.5-17.8 psi
0.95-1.25 kgf/cm²
Replacement Interval (FL22 Type)
5 Years or 60k Miles/96k km
Replacement Interval (Other Types)
2 Years
Coolant Specifications (Except FL22 types):
Above 3F (-16C)
Above -15F (-26C)
Above -40F (-40C)
55/45 Mixture
45/55 Mixture
35/65 Mixture
Distilled Water / Ethylene Glycol Mixture that meets the FL22 standard
Also Acceptable:
Any ethylene glycol-based silicate-free P-OAT (Phosphate Organic Acid Technology) coolant that meets Mazda’s FL22 standard is acceptable.
Information may vary depending on the source. If you notice any information that is incorrect or potentially dangerous, please contact me with supporting citations so I can review and correct it. This is an ongoing learning project and I plan to update the content as I find more accurate and reliable sources.
Sources: