- Gas
- Midsize cars
- MY2000–2006
Infiniti Q45 MPG & Fuel Cost by Year
7 model years · 2000–2006
15,000 mi/yr · premium gasoline $5.36/gal (U.S. average, Sep 2026)
Infiniti Q45 fuel economy at a glance
EPA has rated the Infiniti Q45 for 7 model years, 2000 to 2006. Across those years its combined rating runs 18 MPG. The latest model year, 2006, has 2 configurations rated 18 MPG combined and costing $4,460 a year to fuel at premium gasoline $5.36/gal (U.S. average, Sep 2026). The most efficient configuration on record since 2000 is the 2006 Q45 4.5L 8-cyl RWD, at 18 MPG. EPA ratings go back to 1984: the earliest rating on this page is 17 MPG in 1990.
Infiniti Q45 MPG by year
| Year | Gas (MPG) | $/yr |
|---|---|---|
| 2002-2006 (F50) Generation page | ||
| 2006 | 18 | $4,460 |
| 2005 | 18 | $4,460 |
| 2004 | 18 | $4,460 |
| 2003 | 18 | $4,460 |
| 2002 | 18 | $4,460 |
| 2000-2001 (Y33) Generation page | ||
| 2001 | 18 | $4,460 |
| 2000 | 18 | $4,460 |
Costs use the current EIA price set and 15,000 miles a year for every year, so years are comparable. Green marks the best year for each powertrain.
Infiniti Q45 generations
2 generations between 2000 and 2006. Open one for the table of every model year and configuration.
2006 powertrain options
Infiniti Q45 MPG history, 1990–1999
| Year | Gas (MPG) |
|---|---|
| 1999 | 18 |
| 1998 | 18 |
| 1997 | 18 |
| 1996 | 17 |
| 1995 | 16–17 |
| 1994 | 16–17 |
| 1993 | 15–17 |
| 1992 | 15–17 |
Show 2 more years
| Year | Gas (MPG) |
|---|---|
| 1991 | 15–17 |
| 1990 | 17 |
EPA re-estimated the ratings of pre-2008 vehicles under its 2008 method; these are the re-estimated values.
More Infiniti models
Frequently asked questions
What is the Infiniti Q45's gas mileage by year?
EPA combined ratings for the Infiniti Q45 run 18 MPG across model years 2000 to 2006. The latest year, 2006, is rated 18 MPG.
Which Infiniti Q45 model year has the best gas mileage?
The 2006 Infiniti Q45 Q45 4.5L 8-cyl RWD has the highest combined rating since 2000, at 18 MPG.
How much does a Infiniti Q45 cost to fuel per year?
For MY2006, EPA-rated configurations cost $4,460 a year to fuel, driving 15,000 miles at premium gasoline $5.36/gal (U.S. average, Sep 2026). The most efficient one costs $4,460.
Has the Infiniti Q45's fuel economy improved over time?
Not much. The most efficient configuration is rated 18 MPG in both 2000 and 2006. Going back further, the best rating in 1984 was 17 MPG.
Which Infiniti Q45 model years have the same ratings?
EPA lists identical ratings as the previous year for 2001, 2005. The generation pages mark those years "same EPA ratings" and point to the year that holds the full table.