Official US EPA/DOE fuel-economy, fuel-cost, and emissions data for a vehicle by year + make + model. Because a model-year often has several powertrain configurations (engine/transmission), this returns one entry per configuration, each with: MPG city/highway/combined (or MPGe for EVs), CO2 tailpipe grams/mile, estimated annual fuel cost (USD), annual petroleum use (barrels), EPA greenhouse-gas score (1-10), 5-year savings vs the average new vehicle, plus transmission, drivetrain, cylinders, displacement, fuel type, EPA size class, and electric range for EV/PHEV. Authoritative EPA test figures — the real ratings an agent should not estimate. Keyless, public-domain (FuelEconomy.gov), covers model years 1984+.