1. (a) Each manufacturer of light trucks shall comply with the following fleet average fuel economy standards, expressed in miles per gallon, in the model year specified as applicable:

   Table IModel year 2-wheel drive light trucks 4-wheel drive light trucks Limited product line light trucks Captive imports Other Captive imports Other 197917.215.8 198016.016.014.014.014.0 198116.716.715.015.014.5

   Table IIModel year Combined standard 2-wheel drive light trucks 4-wheel drive light trucks Captive imports Others Captive imports Others Captive imports Others 198217.517.518.018.016.016.0 198319.019.019.519.517.517.5 198420.020.020.320.318.518.5 198519.519.519.719.718.918.9 198620.020.020.520.519.519.5 198720.520.521.021.019.519.5 198820.520.521.021.019.519.5 198920.520.521.521.519.019.0 199020.020.020.520.519.019.0 199120.220.220.720.719.119.1

   Table IIIModel year Combined standard Captive imports Other 199220.220.2 199320.420.4 199420.520.5 199520.620.6

   Table IVModel year Standard 200120.7 200220.7 200320.7 200420.7 200521.0 200621.6 200722.2 200822.5 200923.1 201023.5

   Figure 1:

   

   Where: N is the total number (sum) of light trucks produced by a manufacturer; Ni is the number (sum) of the ith light truck model type produced by a manufacturer; and Ti is the fuel economy target of the ith light truck model type, which is determined according to the following formula, rounded to the nearest hundredth:

   

   Where: Parameters a, b, c, and d are defined in Table V; e = 2.718; and x = footprint (in square feet, rounded to the nearest tenth) of the model type.

   Table V - Parameters for the Light Truck Fuel Economy Targets for MYs 2008-2011Model year Parameters a (mpg) b (mpg) c (gal/mi/ft 2) d (gal/mi) 200828.5619.9949.305.58 200930.0720.8748.005.81 201029.9621.2048.495.50 201127.1021.1056.414.28

   Figure 2:

   

   Where: CAFErequired is the fleet average fuel economy standard for a given light truck fleet; Subscript i is a designation of multiple groups of light trucks, where each group's designation, i.e., i = 1, 2, 3, etc., represents light trucks that share a unique model type and footprint within the applicable fleet. Productioni is the number of light trucks produced for sale in the United States within each ith designation, i.e., which share the same model type and footprint; TARGETi is the fuel economy target in miles per gallon (mpg) applicable to the footprint of light trucks within each ith designation, i.e., which share the same model type and footprint, calculated according to either Figure 3 or Figure 4, as appropriate, 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.

   Figure 3:

   

   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 VI; and The MIN and MAX functions take the minimum and maximum, respectively, of the included values.

   Table VI - Parameters for the Light Truck Fuel Economy Targets for MYs 2012-2016Model year Parameters a (mpg) b (mpg) c (gal/mi/ft 2) d (gal/mi) 201229.8222.270.00045460.014900 201330.6722.740.00045460.013968 201431.3823.130.00045460.013225 201532.7223.850.00045460.011920 201634.4224.740.00045460.010413

   Figure 4:

   

   Where: TARGET is the fuel economy target (in mpg) applicable to vehicles of a given footprint (FOOTPRINT, in square feet); Parameters a, b, c, d, e, f, g, and h are defined in Table VII; and The MIN and MAX functions take the minimum and maximum, respectively, of the included values.

   Table VII - Parameters for the Light Truck Fuel Economy Targets for MYs 2017-2026Model year Parameters a (mpg) b (mpg) c (gal/mi/ft 2) d (gal/mi) e (mpg) f (mpg) g (gal/mi/ft 2) h (gal/mi) 201736.2625.090.00054840.00509735.1025.090.00045460.009851 201837.3625.200.00053580.00479735.3125.200.00045460.009682 201938.1625.250.00052650.00462335.4125.250.00045460.009603 202039.1125.250.00051400.00449435.4125.250.00045460.009603 202139.7125.630.0005060.00443NANANANA 202240.3126.020.0004990.00436NANANANA 202340.9326.420.0004910.00429NANANANA 202441.5526.820.0004840.00423NANANANA 202542.1827.230.0004770.00417NANANANA 202642.8227.640.0004690.00410NANANANA

2. (b) (1) For model year 1979, each manufacturer may:

   1. (i) Combine its 2- and 4-wheel drive light trucks and comply with the average fuel economy standard in paragraph (a) of this section for 2-wheel drive light trucks; or
   2. (ii) Comply separately with the two standards specified in paragraph (a) of this section.
   3. (2) For model year 1979, the standard specified in paragraph (a) of this section for 4-wheel drive light trucks applies only to 4-wheel drive general utility vehicles. All other 4-wheel drive light trucks in that model year shall be included in the 2-wheel drive category for compliance purposes.

3. (c) For model years 1980 and 1981, manufacturers of limited product line light trucks may:

   1. (1) Comply with the separate standard for limited product line light trucks, or
   2. (2) Comply with the other standards specified in § 533.5(a), as applicable.

4. (d) For model years 1982-91, each manufacture may:

   1. (1) Combine its 2- and 4-wheel drive light trucks (segregating captive import and other light trucks) and comply with the combined average fuel economy standard specified in paragraph (a) of this section; or
   2. (2) Comply separately with the 2-wheel drive standards and the 4-wheel drive standards (segregating captive import and other light trucks) specified in paragraph (a) of this section.
5. (e) For model year 1992, each manufacturer shall comply with the average fuel economy standard specified in paragraph (a) of this section (segregating captive import and other light trucks).
6. (f) For each model year 1996 and thereafter, each manufacturer shall combine its captive imports with its other light trucks and comply with the fleet average fuel economy standard in paragraph (a) of this section.
7. (g) For model years 2008-2010, at a manufacturer's option, a manufacturer's light truck fleet may comply with the fuel economy standard calculated for each model year according to Figure 1 and the appropriate values in Table V, with said option being irrevocably chosen for that model year and reported as specified in § 537.8.
8. (h) For model year 2011, a manufacturer's light truck fleet shall comply with the fleet average fuel economy standard calculated for that model year according to Figure 1 and the appropriate values in Table V.
9. (i) For model years 2012-2016, a manufacturer's light truck fleet shall comply with the fleet average fuel economy standard calculated for that model year according to Figures 2 and 3 and the appropriate values in Table VI.

10. (j) For model years 2017-2025, a manufacturer's light truck fleet shall comply with the fleet average fuel economy standard calculated for that model year according to Figures 2 and 4 and the appropriate values in Table VII.

    Editorial Note:For Federal Register citations affecting § 533.5, 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 12014, Mar. 23, 1978]