Corporate Average Fuel Economy. It's a regulation mandating fuel efficiency for vehicles. https://www.nhtsa.gov/laws-regulations/corporate-average-fuel-economy

Corporate Average Fuel Economy. It's a regulation mandating fuel efficiency for vehicles. https://www.nhtsa.gov/laws-regulations/corporate-average-fuel-economy https://www.nhtsa.gov/laws-regulations/corporate-average-fue... is the full explanation.