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Compliance and Fuel Economy Data for Vehicles and Engines

  • Emissions and Fuel Economy Data

    This site is intended for those interested in obtaining detailed data and performing data analysis.

Emission Test Data & Engine Certification

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  • Annual Certification Data for Vehicles, Engines, and Equipment
  • Heavy-Duty Manufacturer-Run In-Use Testing Data
  • Light-Duty Manufacturer-Run In-Use Testing Data
  • EPA Heavy-Duty Vehicle and Engine Greenhouse Gas Emissions Compliance Report
  • EPA Heavy-Duty Engine Criteria Pollutant Compliance Reports

Fuel Economy
Test Data

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  • Data on cars used for testing fuel economy
  • Reports on cars used for testing fuel economy
  • Test data for annual Fuel Economy Guide

Related Information

  • Fuel economy
  • Certification and compliance for vehicles and engines

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Last updated on March 31, 2025
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