Fuel Gauge - Ford 2004 Mustang Owner's Manual

Instrumentation
Instrumentation

FUEL GAUGE

The fuel gauge in your NGV behaves similarly to a typical gasoline fuel
gauge. However, the gauge operation is based on the pressure and
temperature of the natural gas, not on the level of liquid gasoline.
Depending upon application, a fuel gauge reading of Full will occur at a
pressure of approximately 20,700 kPa (3,000 psi) or 24,800 kPa (3,600 psi),
at a temperature of approximately 21°C (70°F). The NGV fuel gauge will
provide a linear reading from this point down to Empty. Refer to the
Fueling section of this supplement for more information on fuel gauge
performance during the fast-fill method of fueling.
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