How many miles does a honda odessey run on a gallan of gas?

[Marriam]

If the gas price is about 2.45 per gallon.
If the average everyday distance is about 5 miles. The year of the car is 1999.If the price is 2.45 per gallon, regular gas.

 

[Ron again]

Need more info who doing the Driving makes a big difference and how they drive ,what year but I would guess at about 28 mpg.