NA Miata Engine Coolant
Coolant Capacity (1990 - 1993)
6.3 Qt
6.0 L
Coolant Capacity (1994 - 1997)
6.3 Qt
6.0 L
Pressure Cap (1990 - 1993)
11-15 psi
0.75-1.05 kg/cm²
Pressure Cap (1994 - 1997)
10.7-14.9 psi
0.75-1.05 kg/cm²
Replacement Interval (1990 - 1991)
30 Months or 30,000 Miles
Replacement Interval (1994 - 1995)
30 Months or 24,000 Miles
Replacement Interval (1996 - 1997)
24 Months or 30,000 Miles
Coolant Specifications:
Above 3F (-16C)
Above -15F (-26C)
45/55 Mixture
35/65 Mixture
50/50 Conventional Green or Asian Green/Yellow (low-silicate)
Also Acceptable:
Distilled Water / Ethylene Glycol Mixture
Above -40F (-40C)
55/45 Mixture
FL22 is Safe, but Not Required
Sources: