* 6.0L V8: This engine generally gets the worst fuel economy, typically in the range of 10-14 MPG combined (city and highway driving).
* 5.4L V8: This engine offers slightly better fuel economy than the 6.0L, possibly achieving 12-16 MPG combined, but still low.
Real-world fuel economy will vary based on driving habits, terrain, vehicle condition, and payload. Expect lower MPG in city driving and with heavier loads. The EPA estimates are usually optimistic.