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www.fueleconomy.gov - the official government source for fuel economy information

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    • Vehicles produce about half of the greenhouse gases from a typical U.S. household.
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    Your Mileage Will Still Vary

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    Where the Energy Goes

    • Only about 14%–26% of the energy from the fuel you put in your tank gets used to move your car down the road.
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Compare Old and New MPG Estimates

Model Year: 1999

Make: Porsche

Model: 911 Carrera

Select Engine and Transmission Options...

  • Automatic 5-spd, 6 cyl, 3.4 L, Premium Gasoline, 2MODE
  • Manual 6-spd, 6 cyl, 3.4 L, Premium Gasoline
  • Automatic 5-spd, 6 cyl, 3.4 L, Premium Gasoline, FFS
  • Manual 6-spd, 6 cyl, 3.4 L, Premium Gasoline, FFS
View Engine and Transmission Descriptors
  • Old vs. New Ratings
    • 2008 Ratings Changes
    • Compare Old and New Ratings
  • Your Mileage Will Still Vary
  • Fuel Economy Tests

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