Average Required Fuel Economy (miles per gallon) 2017.039.029.434 2018.040.430.034.89999999999999857891452847979962825775146484375 2019.041.930.535.7999999999999971578290569595992565155029296875 2020.043.631.136.89999999999999857891452847979962825775146484375 2021.044.231.636.89999999999999857891452847979962825775146484375 2022.044.932.136.89999999999999857891452847979962825775146484375 2023.045.632.636.89999999999999857891452847979962825775146484375 2024.046.333.137 2025.047.033.637 2026.047.734.137 Average Projected Emissions Compliance Levels under the Footprint-based Carbon Dioxide Standards (grams per mile) 2017.0220.0306.0254 2018.0209.0293.0244 2019.0197.0281.0236 2020.0187.0268.0227 2021.0178.0257.0241 2022.0175.0253.0241 2023.0171.0250.0241 2024.0168.0248.0241 2025.0167.0245.0240 2026.0165.0240.0240 Note: The presented rates of increase in stringency for NHTSA CAFE standards are lower than the Environmental Protection Agency (EPA) rates of increase in stringency for greenhouse gas (GHG) standards. One major difference is that NHTSA’s standards, unlike EPA’s, do not reflect the inclusion of air conditioning system refrigerant and leakage improvements, but EPA’s standards would allow consideration of such improvements which reduce GHGs but generally do not affect fuel economy. The agencies expect, however, that a portion of these improvements will be made through reductions in air conditioning leakage, which would not contribute to fuel economy. Source: Federal Register, Vol. 85, No. 84, April 30, 2020. (Additional resources: www.nhtsa.gov/fuel-economy)