Questions about the US Car Models API

The things developers ask before wiring up the US Car Models API — what it returns, what it covers, and where the limits are. Straight answers, no fluff.

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What vehicles are included in the database?
All passenger vehicles certified for sale in the US market from 1984 to present. This includes cars, SUVs, trucks, and vans from all major manufacturers. Data is sourced from the EPA's official fuel economy database.
How often is the data updated?
Vehicle data is updated weekly to include new model year vehicles as they receive EPA certification. New vehicles typically appear in our database shortly after their EPA fuel economy ratings are published.
Can I search by make, model, and year?
Yes! You can filter by make (manufacturer), year, and model. Use make alone to get all models from a manufacturer, add year to filter by model year, or specify all three for exact model details.
What fuel economy data is available?
Each vehicle includes city MPG, highway MPG, and combined MPG ratings. Electric and hybrid vehicles include equivalent MPG (MPGe) and electric range data where applicable.
Are electric vehicles included?
Yes! Electric vehicles include CityELEC, HighwELEC, and CombELEC fields for electric range and efficiency. Plug-in hybrids include both gasoline MPG and electric range data.
What engine specifications are provided?
Engine data includes cylinder count (Cyl), displacement in liters (Displace), and fuel type (Regular, Premium, Diesel, Electric, E85, etc.). Transmission type and number of speeds are also included.
Is this data available for international markets?
This API specifically covers vehicles sold in the United States with EPA fuel economy ratings. Specifications may differ for the same model sold in other markets.
How do I get data for a specific trim level?
Use the year, make, model, and trim parameters together to get data for a specific trim. Different trims of the same model often have different engine options and fuel economy ratings.

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