Against 361 other V8 cars rated 2006–2008, the FX45 trails their 15.7 mpg average by 1.7 mpg, about $297 a year.
Every Infiniti FX45 engine, compared
The Infiniti FX45 was rated in a single specification, so its gas mileage does not vary by version — only by model year. Yearly cost assumes 12,000 miles at $3.20 a gallon.
| Engine | Combined | City / Highway | Years | Fuel per year |
|---|---|---|---|---|
| 4.5L 8-cyl | 13.2 / 17.5 | 2003–2008 | $2,595 |
What that actually costs
Against its rivals in the same model years, the Chevrolet Trailblazer gets 16.5 mpg, the Honda Element 22 mpg and the Jeep Liberty 18 mpg, next to 14 mpg for the 2008 FX45. The FX45 costs the most of them to run: $998 a year more than the Honda Element.
| Measure | Value |
|---|---|
| Cost per mile (2008) | $0.229 |
| Fuel per year | $2,743 |
| Fuel over five years | $13,715 |
| Against other V8 cars, 2006–2008 | +$297 a year |
| EPA's own estimate | $5,208 a year |
City or highway — who is this car for
The 2008 Infiniti FX45 gives up 4 mpg in town: 17 on the highway against 13 in the city, $695 a year if every mile were city driving.
| Measure | Value | Reading |
|---|---|---|
| City (2008) | 13 mpg | $2,954 a year if you only drive in town |
| Highway | 17 mpg | $2,259 a year if you mostly commute |
| Gap | +4 mpg (31%) | Wide — this car dislikes traffic |
How the FX45 changed over the years
The FX45 peaked in 2007 at 15 mpg (13 city, 17 highway) and was at its thirstiest in 2008 at 14 — 1 mpg apart, or $183 a year in fuel between buying one year and the other. The 2008 car does 14.
| Model year | Combined | City / Highway | Engines offered | Fuel per year |
|---|---|---|---|---|
| 2008 | 13 / 17 | 1 | $2,743 | |
| 2007 | 13 / 17 | 1 | $2,560 | |
| 2006 | 13 / 17 | 1 | $2,560 | |
| 2005 | 14 / 18 | 1 | $2,560 | |
| 2004 | 13 / 18 | 1 | $2,560 | |
| 2003 | 13 / 18 | 1 | $2,560 |
MPG is a number. Dollars per year is the answer.
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How we count
This page rests on 6 EPA ratings of the Infiniti FX45 — 1 engine across 2003–2008. The mileage is EPA's laboratory figure, unchanged; the yearly bill is ours, at 12,000 miles and $3.20 a gallon, against EPA's own estimate of $5,208. Full method.
Frequently asked questions
What mpg does the 2008 Infiniti FX45 get?
14 mpg combined, 13 city and 17 highway, per EPA. Across every year since 2003 the FX45 has averaged 14.8 mpg.
Is the 2008 FX45 more efficient than the 2007?
No: 14 against 15 mpg combined, about $183 a year more to run.
Which FX45 year has the best gas mileage?
The 2007, at 15 mpg combined (13 city, 17 highway).
Does the FX45 get better gas mileage than the Chevrolet Trailblazer?
No: 14 mpg for the 2008 FX45 against 16.5 for the 2009 Chevrolet Trailblazer, about $416 a year more to run.
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