Should I Use Diesel or Jet Fuel in My Prius?
Understanding the fuel requirements for your Prius and why diesel or jet fuel is not suitable.
Fuel Requirements for Your Prius
Your Prius is designed to run on regular gasoline, specifically unleaded fuel. Using the correct fuel type is crucial for optimal performance and to avoid damaging the engine. Diesel and jet fuel are not compatible with gasoline engines like the one in your Prius.
Why Diesel and Jet Fuel Are Not Suitable
Diesel fuel is intended for diesel engines, which operate differently than gasoline engines. Diesel engines use compression ignition, while gasoline engines use spark ignition. Using diesel in a gasoline engine can lead to severe engine damage, including misfires and potential failure.
Jet fuel, on the other hand, is designed for aircraft engines and has a different chemical composition than gasoline. It is not suitable for any automotive engine, including your Prius, and could cause catastrophic engine failure.
What to Do If You've Used the Wrong Fuel
If you accidentally put diesel or jet fuel in your Prius, do not start the engine. Contact a professional mechanic or roadside assistance to have the fuel drained and replaced with the correct gasoline. Starting the engine with the wrong fuel can lead to extensive damage and costly repairs.
Answered from our EPA fuel data and general, well-established fuel facts in response to real driver questions. Anything car-specific — especially whether premium is required vs recommended — is in your owner's manual, so we point you there instead of guessing.
More questionsUnconfirmed questionsAll guides
EPA/DOE FuelEconomy.gov data retrieved 2026-07-24.