Where:
Average MPG = the fleet average fuel economy for a category of vehicles;
MPG = the average fuel economy for a category of vehicles determined according to paragraph (h) of this section;
FCIVAC = Air conditioning fuel economy credits for a category of vehicles, in gallons per mile, determined according to paragraph (c)(3)(i) of this section;
FCIVOC = Off-cycle technology fuel economy credits for a category of vehicles, in gallons per mile, determined according to paragraph (c)(3)(ii) of this section; and
FCIVPU = Pickup truck fuel economy credits for the light truck category, in gallons per mile, determined according to paragraph (c)(3)(iii) of this section.
Where:
F = 0.00 unless otherwise approved by the Administrator according to the provisions of paragraph (k) of this section;
MPGA = The combined model type fuel economy for operation on alcohol fuel as determined in § 600.208-12(b)(5)(ii) divided by 0.15 provided the requirements of paragraph (g) of this section are met; and
MPGG = The combined model type fuel economy for operation on gasoline or diesel fuel as determined in § 600.208-12(b)(5)(i) .
Where:
MPGCNG = The combined model type fuel economy for operation on natural gas as determined in § 600.208-12(b)(5)(ii) divided by 0.15 provided the requirements of paragraph (g) of this section are met; and
MPGG = The combined model type fuel economy for operation on gasoline or diesel fuel as determined in § 600.208-12(b)(5)(i) .
UF = A Utility Factor (UF) value selected from the following table based on the driving range of the vehicle while operating on natural gas, except for natural gas dual fuel vehicles that do not meet the criteria in paragraph (c)(2)(vii)(B) the Utility Factor shall be 0.5. Determine the vehicle's driving range in miles by multiplying the combined fuel economy as determined in § 600.208-12(b)(5)(ii) by the vehicle's usable fuel storage capacity (as defined at § 600.002 and expressed in gasoline gallon equivalents), and rounding to the nearest 10 miles.
Driving range (miles) | UF |
10 | 0.228 |
20 | 0.397 |
30 | 0.523 |
40 | 0.617 |
50 | 0.689 |
60 | 0.743 |
70 | 0.785 |
80 | 0.818 |
90 | 0.844 |
100 | 0.865 |
110 | 0.882 |
120 | 0.896 |
130 | 0.907 |
140 | 0.917 |
150 | 0.925 |
160 | 0.932 |
170 | 0.939 |
180 | 0.944 |
190 | 0.949 |
200 | 0.954 |
210 | 0.958 |
220 | 0.962 |
230 | 0.965 |
240 | 0.968 |
250 | 0.971 |
260 | 0.973 |
270 | 0.976 |
280 | 0.978 |
290 | 0.980 |
300 | 0.981 |
Where:
FCIVAC = the fleet production-weighted total value of air conditioning efficiency credits (fuel consumption improvement value) for all air conditioning systems in the applicable fleet, expressed in gallons per mile;
ACCredit = the total of all air conditioning efficiency credits for the applicable vehicle category, in megagrams, from 40 CFR 86.1868-12(c) , and rounded to the nearest whole number;
VLM = vehicle lifetime miles, which for passenger automobiles shall be 195,264 and for light trucks shall be 225,865; and
Production = the total production volume for the applicable category of vehicles.
Where:
FCIVOC = the fleet production-weighted total value of off-cycle technology credits (fuel consumption improvement value) for all off-cycle technologies in the applicable fleet, expressed in gallons per mile;
OCCredit = the total of all off-cycle technology credits for the applicable vehicle category, in megagrams, from 40 CFR 86.1869-12(e) , and rounded to the nearest whole number;
VLM = vehicle lifetime miles, which for passenger automobiles shall be 195,264 and for light trucks shall be 225,865; and
Production = the total production volume for the applicable category of vehicles.
Where:
FCIVPU = the fleet production-weighted total value of full size pickup truck credits (fuel consumption improvement value) for the light truck fleet, expressed in gallons per mile;
PUCredit = the total of all full size pickup truck credits, in megagrams, from 40 CFR 86.1870-12(c) , and rounded to the nearest whole number; and
Production = the total production volume for the light truck category.
AFEadj = AFE[((0.55 * a * c) + (0.45 * c) + (0.5556 * a) + 0.4487)/((0.55 * a) + 0.45)] + IW
Where:
AFE = Average combined fuel economy as calculated in paragraph (c)(2) of this section, rounded to the nearest 0.0001 mpg;
AFE = Average combined fuel economy as calculated in paragraph (c) of this section, rounded to the nearest 0.0001 mpg;
a = Sales-weight average (rounded to the nearest 0.0001 mpg) of all model type highway fuel economy values (rounded to the nearest 0.1 mpg) divided by the sales-weighted average (rounded to the nearest 0.0001 mpg) of all model type city fuel economy values (rounded to the nearest 0.1 mpg). The quotient shall be rounded to 4 decimal places. These average fuel economies shall be determined using the methodology of paragraph (c) of this section.
c = 0.0014;
IW = (9.2917 * 10-3 * SF3IWC * FE3IWC) - (3.5123 * 10-3 * SF4ETW * FE4IWC).
Note: Any calculated value of IW less than zero shall be set equal to zero.
SF3IWC = The 3000 lb. inertia weight class sales divided by total sales. The quotient shall be rounded to 4 decimal places.
SF4ETW = The 4000 lb. equivalent test weight category sales divided by total sales. The quotient shall be rounded to 4 decimal places.
FE4IWC = The sales-weighted average combined fuel economy of all 3000 lb. inertia weight class base levels in the compliance category. Round the result to the nearest 0.0001 mpg.
FE4IWC = The sales-weighted average combined fuel economy of all 4000 lb. inertia weight class base levels in the compliance category. Round the result to the nearest 0.0001 mpg.
Ealt/Epet[GREATER THAN EQUAL TO] 1
Where:
Ealt = [FEalt/(NHValt * Dalt)] * 106 = energy efficiency while operating on alternative fuel rounded to the nearest 0.01 miles/million BTU.
Epet = [FEpet/(NHVpet * Dpet)] * 106 = energy efficiency while operating on gasoline or diesel (petroleum) fuel rounded to the nearest 0.01 miles/million BTU.
FEalt is the fuel economy [miles/gallon for liquid fuels or miles/100 standard cubic feet for gaseous fuels] while operated on the alternative fuel as determined in § 600.113-12(a) and (b) .
FEpet is the fuel economy [miles/gallon] while operated on petroleum fuel (gasoline or diesel) as determined in § 600.113-12(a) and (b) .
NHValt is the net (lower) heating value [BTU/lb] of the alternative fuel.
NHVpet is the net (lower) heating value [BTU/lb] of the petroleum fuel.
Dalt is the density [lb/gallon for liquid fuels or lb/100 standard cubic feet for gaseous fuels] of the alternative fuel.
Dpet is the density [lb/gallon] of the petroleum fuel.
Model year | Maximum increase (mpg) |
1993-2014 | 1.2 |
2015 | 1.0 |
2016 | 0.8 |
2017 | 0.6 |
2018 | 0.4 |
2019 | 0.2 |
Where:
FltAvg = The fleet average CREE value in grams per mile, rounded to the nearest whole number, for passenger automobiles or light trucks determined for the applicable model year according to paragraph (j) of this section, except by assuming all alcohol dual fuel and natural gas dual fuel automobiles are operated exclusively on gasoline (or diesel) fuel. For the purposes of these calculations, the values for natural gas dual fuel automobiles using the optional Utility Factor approach in paragraph (j)(2)(vii) of this section shall not be the gasoline CREE values, but the CREE values determined in paragraph (j)(2)(vii) of this section.
MPGMAX = The maximum increase in miles per gallon determined for the appropriate model year in paragraph (h) of this section.
CREE = (F * CREEalt) + ((1 - F) * CREEgas)
Where:
F = 0.00 unless otherwise approved by the Administrator according to the provisions of paragraph (k) of this section;
CREEalt = The combined model type carbon-related exhaust emissions value for operation on alcohol fuel as determined in § 600.208-12(b)(5)(ii) ; and
CREEgas = The combined model type carbon-related exhaust emissions value for operation on gasoline or diesel fuel as determined in § 600.208-12(b)(5)(i) .
Where:
CREECNG = The combined model type carbon-related exhaust emissions value for operation on natural gas as determined in § 600.208-12(b)(5)(ii) ; and
CREEGAS = The combined model type carbon-related exhaust emissions value for operation on gasoline or diesel fuel as determined in § 600.208-12(b)(5)(i) .
UF = A Utility Factor (UF) value selected from the following table based on the driving range of the vehicle while operating on natural gas, except for natural gas dual fuel vehicles that do not meet the criteria in paragraph (j)(2)(vii)(B) the Utility Factor shall be 0.5. Determine the vehicle's driving range in miles by multiplying the combined fuel economy as determined in § 600.208-12(b)(5)(ii) by the vehicle's usable fuel storage capacity (as defined at § 600.002 and expressed in gasoline gallon equivalents), and rounding to the nearest 10 miles.
Driving range (miles) | UF |
10 | 0.228 |
20 | 0.397 |
30 | 0.523 |
40 | 0.617 |
50 | 0.689 |
60 | 0.743 |
70 | 0.785 |
80 | 0.818 |
90 | 0.844 |
100 | 0.865 |
110 | 0.882 |
120 | 0.896 |
130 | 0.907 |
140 | 0.917 |
150 | 0.925 |
160 | 0.932 |
170 | 0.939 |
180 | 0.944 |
190 | 0.949 |
200 | 0.954 |
210 | 0.958 |
220 | 0.962 |
230 | 0.965 |
240 | 0.968 |
250 | 0.971 |
260 | 0.973 |
270 | 0.976 |
280 | 0.978 |
290 | 0.980 |
300 | 0.981 |
40 C.F.R. §600.510-12