49 C.F.R. § 531.5
Fuel economy standards.
Effective Apr 30, 2020
Viewing an earlier version · effective Apr 30, 2020View current
Link to an amendment published at 85 FR 25272, Apr. 30, 2020.
(a) Except as provided in paragraph (f) of this section, each manufacturer of passenger automobiles shall comply with the fleet average fuel economy standards in Table I, expressed in miles per gallon, in the model year specified as applicable:
(b) For model year 2011, a manufacturer's passenger automobile fleet shall comply with the fleet average fuel economy level calculated for that model year according to Figure 1 and the appropriate values in Table II.
Where: N is the total number (sum) of passenger automobiles produced by a manufacturer; N i is the number (sum) of the ith passenger automobile model produced by the manufacturer; and T i is the fuel economy target of the ith model passenger automobile, which is determined according to the following formula, rounded to the nearest hundredth:
Where: Parameters a, b, c, and d are defined in Table II; e = 2.718; and x = footprint (in square feet, rounded to the nearest tenth) of the vehicle model.
Table II-Parameters for the Passenger Automobile Fuel Economy TargetsModel year Parameters a (mpg) b (mpg) c (gal/mi/ft 2) d (gal/mi) 201131.2024.0051.411.91
(c) For model years 2012-2025, a manufacturer's passenger automobile fleet shall comply with the fleet average fuel economy level calculated for that model year according to Figure 2 and the appropriate values in Table III.
Where: CAFE required is the fleet average fuel economy standard for a given fleet (domestic passenger automobiles or import passenger automobiles); Subscript i is a designation of multiple groups of automobiles, where each group's designation, i.e., i = 1, 2, 3, etc., represents automobiles that share a unique model type and footprint within the applicable fleet, either domestic passenger automobiles or import passenger automobiles; Production i is the number of passenger automobiles produced for sale in the United States within each ith designation, i.e., which share the same model type and footprint; TARGET i is the fuel economy target in miles per gallon (mpg) applicable to the footprint of passenger automobiles within each ith designation, i.e., which share the same model type and footprint, calculated according to Figure 3 and rounded to the nearest hundredth of a mpg, i.e., 35.455 = 35.46 mpg, and the summations in the numerator and denominator are both performed over all models in the fleet in question.
Where: TARGET is the fuel economy target (in mpg) applicable to vehicles of a given footprint (FOOTPRINT, in square feet); Parameters a, b,c, and d are defined in Table III; and The MIN and MAX functions take the minimum and maximum, respectively, of the included values.
Table III-Parameters for the Passenger Automobile Fuel Economy Targets, MYs 2012-2025Model year Parameters a (mpg) b (mpg) c (gal/mi/ft 2) d (gal/mi) 201235.9527.950.00053080.006057 201336.8028.460.00053080.005410 201437.7529.030.00053080.004725 201539.2429.900.00053080.003719 201641.0930.960.00053080.002573 201743.6132.650.00051310.001896 201845.2133.840.00049540.001811 201946.8735.070.00047830.001729 202048.7436.470.00046030.001643 202150.8338.020.00044190.001555 202253.2139.790.00042270.001463 202355.7141.640.00040430.001375 202458.3243.580.00038670.001290 202561.0745.610.00036990.001210
(d) In addition to the requirements of paragraphs (b) and (c) of this section, each manufacturer shall also meet the minimum fleet standard for domestically manufactured passenger automobiles expressed in Table IV:
Table IV - Minimum Fuel Economy Standards for Domestically Manufactured Passenger Automobiles, MYs 2011-2021Model year Minimum standard 201127.8 201230.7 201331.4 201432.1 201533.3 201634.7 201736.7 201838.0 201939.4 202040.9 202142.7 202244.7 202346.8 202449.0 202551.3
- (e) For model years 2022-2025, each manufacturer shall comply with the standards set forth in paragraphs (c) and (d) in this section, if NHTSA determines in a rulemaking, initiated after January 1, 2017, and conducted in accordance with 49 U.S.C. 32902, that the standards in paragraphs (c) and (d) are the maximum feasible standards for model years 2022-2025. If, for any of those model years, NHTSA determines that the maximum feasible standard for passenger cars and the corresponding minimum standard for domestically manufactured passenger cars should be set at a different level, manufacturers shall comply with those different standards in lieu of the standards set forth for those model years in paragraphs (c) and (d), and NHTSA will revise this section to reflect the different standards.
(f) The following manufacturers shall comply with the standards indicated below for the specified model years:
(1) Avanti Motor Corporation.
Average Fuel Economy StandardModel year Miles per gallon 197816.1 197914.5 198015.8 198118.2 198218.2 198316.9 198416.9 198516.9
(2) Rolls-Royce Motors, Inc.
Model year Average fuel economy standard (miles per gallon) 1978 10.7 1979 10.8 1980 11.1 1981 10.7 1982 10.6 1983 9.9 1984 10.0 1985 10.0 1986 11.0 1987 11.2 1988 11.2 1989 11.2 1990 12.7 1991 12.7 1992 13.8 1993 13.8 1994 13.8 1995 14.6 1996 14.6 1997 15.1 1998 16.3 1999 16.3 (3) Checker Motors Corporation.
Average Fuel Economy StandardModel year Miles per gallon 197817.6 197916.5 198018.5 198118.3 198218.4
(4) Aston Martin Lagonda, Inc.
Average Fuel Economy StandardModel year Miles per gallon 197911.5 198012.1 198112.2 198212.2 198311.3 198411.3 198511.4
(5) Excalibur Automobile Corporation.
Average Fuel Economy StandardModel year Miles per gallon 197811.5 197911.5 198016.2 198117.9 198217.9 198316.6 198416.6 198516.6
(6) Lotus Cars Ltd.
Model year Average fuel economy standard (miles per gallon) 1994 24.2 1995 23.3 (7) Officine Alfieri Maserati, S.p.A.
Average Fuel Economy StandardModel year Miles per gallon 197812.5 197912.5 19809.5 198417.9 198516.8
(8) Lamborghini of North America.
Average Fuel Economy StandardModel year Miles per gallon 198313.7 198413.7
(9) LondonCoach Co., Inc.
Average Fuel Economy StandardModel year Miles per gallon 198521.0 198621.0 198721.0
(10) Automobili Lamborghini S.p.A./Vector Aeromotive Corporation.
Model year Average fuel economy standard (miles per gallon) 1995 12.8 1996 12.6 1997 12.5 (11) Dutcher Motors, Inc.
Model year Average fuel economy standard (miles per gallon) 1986 16.0 1987 16.0 1988 16.0 1992 17.0 1993 17.0 1994 17.0 1995 17.0 (12) MedNet, Inc.
Model year Average fuel economy standard (miles per gallon) 1996 17.0 1997 17.0 1998 17.0 (13) Vector Aeromotive Corporation.
Model year Average fuel economy standard (miles per gallon) 1998 12.1 (14) Qvale Automotive Group Srl.
Model year Average fuel economy standard (miles per gallon) 2000 22.0 2001 22.0 (15) Spyker Automobielen B.V.
Average Fuel Economy StandardModel year Miles per gallon 200618.9 200718.9
Editorial Note:For Federal Register citations affecting § 531.5, see the List of CFR Sections Affected, which appears in the Finding Aids section of the printed volume and at www.govinfo.gov.
[43 FR 28204, June 29, 1978]