With that being said, the fuel economy of a 2.8 diesel Frontera can vary widely depending on the year of production and specific trim level. However, according to fuel economy estimates from the United States Environmental Protection Agency (EPA), the 1998 Isuzu Rodeo with a 2.8L diesel engine has an estimated fuel economy of:
- 21 MPG (miles per gallon) in city driving
- 25 MPG on the highway
It's important to note that these estimates are provided by the manufacturer and actual fuel economy may vary based on individual driving habits and vehicle conditions.