fuel efficiency

{
  "id": "NISTq198",
  "unitsml_id": "q:fuel_efficiency",
  "name": "fuel efficiency",
  "names": [
    {
      "value": "fuel efficiency",
      "lang": "en"
    },
    {
      "value": "fuel economy",
      "lang": "en"
    }
  ],
  "short": "fuel_efficiency",
  "type": "derived",
  "dimension": {
    "id": "NISTd99",
    "name": "fuel efficiency",
    "expression": "L-2",
    "components": [
      {
        "key": "length",
        "symbol": "L",
        "power": -2
      }
    ],
    "dimensionless": false
  },
  "units": [
    {
      "id": "NISTu363",
      "name": "mile per gallon (US)",
      "symbol": "mi/gal"
    },
    {
      "id": "NISTu380",
      "name": "kilometer per liter",
      "symbol": "km/L"
    }
  ],
  "unit_count": 2,
  "identifiers": [
    {
      "type": "nist",
      "id": "NISTq198"
    },
    {
      "type": "unitsml",
      "id": "q:fuel_efficiency"
    }
  ],
  "references": []
}