* City driving: Around 20-25 mpg (miles per gallon) is a reasonable expectation for many models.
* Highway driving: Around 28-35 mpg might be achievable in some models, depending on speed and terrain.
To get a more precise estimate, you should specify the year and engine of the Dodge Neon you're interested in. You can then search online (e.g., using Google or Edmunds) for that specific model's EPA fuel economy ratings. These ratings provide city and highway estimates.