Bureau of Transportation Statistics (BTS)
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Table 4-23M. Average Fuel Efficiency of U.S. Passenger Cars, Light Trucks, and Light-Duty Vehicles

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  1980 1985 1990 1995 1996 1997 1998 1999
Average U.S. passenger car fuele fficiency (kpl) (calendar year)R                
Passenger car 6.8 7.4 8.6 9.0 9.0 9.1 9.1 U
Other 2-axle 4-tire vehicle 5.2 6.1 6.8 7.4 7.3 7.3 7.3 U
New vehicle fuel efficiency (kpl)a (model year)R                
Light-duty vehicle (passenger cars plus light trucks)                
Domestic 9.1 10.2 10.2 10.1 10.2 9.9 9.9 10.1
Imported 12.2 12.9 12.1 11.9 11.8 11.7 11.7 11.4
Passenger car                
Domestic 9.6 11.2 11.4 11.8 12.0 11.8 11.9 12.0
Imported 12.6 13.4 12.7 12.9 12.6 12.8 12.7 12.1
Light truck (<3,865 lbs GVWR)                
Domestic 7.1 8.3 8.6 8.6 8.7 8.6 8.7 8.7
Imported 10.3 11.3 9.8 9.1 9.4 9.4 9.7 9.6
CAFE standards (kpl)a (model year)R                
Passenger car 8.5 11.7 11.7 11.7 11.7 11.7 11.7 11.7
Light truck 6.8/6.0b 8.3 8.5 8.8 8.8 8.8 8.8 8.8

a Assumes 55% city and 45% highway-kilometers. The source calculated average kilometers per liter for light-duty vehicles by  taking the reciprocal of the sales-weighted average of liters per kilometer. This is called the harmonic average.
b 2 Wheel Drive/4 Wheel Drive. No combined figure available for this year.  

KEY: CAFE = Corporate Average Fuel Economy; GVWR = gross vehicle weight rating; kpl = kilometers per liter; R = revised; U = data are unavailable. 

NOTE: The fuel efficiency figures for light duty vehicles represent the sales-weighted harmonic average of the combined passenger car and light truck fuel economies.

SOURCES: 
Average U.S. passenger car fuel efficiency: 
1980-94: U.S. Department of Transportation, Federal Highway Administration, Highway Statistics Summary to 1995, FHWA-PL-97-009 (Washington, DC: July 1997), table VM-201A.  1995-98: Ibid., Highway Statistics (Washington, DC: Annual issues), table VM-1. 
New vehicle fuel efficiency (based on model year production): 
1980-99: U.S. Environmental Protection Agency, final fuel economy calculations for the U.S. Department of Transportation, National Highway Traffic Safety Administration,  as cited in Internet site www.nhtsa.dot.gov/cars/problems/fuelecon/index.html. 1991-99: Manufacturer's preliminary estimates for the U.S. Department of Transportation, National Highway Traffic Safety Administration, as cited in  Internet site www.nhtsa.dot.gov/cars/problems/fuelecon/index.html.
CAFE standards: 
1980-99: U.S. Department of Transportation, National Highway Traffic Safety Administration, as cited in Internet site www.nhtsa.dot.gov/cars/problems/fuelecon/index.html



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