Against 419 other V6 cars rated 2001–2003, the QX4 trails their 18.8 mpg average by 2.8 mpg, about $357 a year. Averaged over the years each was sold, the most economical engine since 1997, the 3.5L 6-cyl (2001–2003), does 15.3 mpg and the thirstiest, the 3.3L 6-cyl (1997–2000), 15: $50 a year apart.
Every Infiniti QX4 engine, compared
Yearly cost assumes 12,000 miles at $3.20 a gallon.
| Engine | Combined | City / Highway | Years | Fuel per year |
|---|---|---|---|---|
| 3.5L 6-cyl | 14 / 18.3 | 2001–2003 | $2,510 | |
| 3.3L 6-cyl | 13.3 / 17 | 1997–2000 | $2,560 |
What that actually costs
Against its rivals in the same model years, the Jeep Liberty gets 17.8 mpg, the Nissan Xterra 17.8 mpg and the Cadillac SRX 16.5 mpg, next to 16 mpg for the 2003 QX4. The QX4 costs the most of them to run: $243 a year more than the Jeep Liberty.
| Measure | Value |
|---|---|
| Cost per mile (2003) | $0.200 |
| Fuel per year | $2,400 |
| Fuel over five years | $12,000 |
| Against other V6 cars, 2001–2003 | +$357 a year |
| EPA's own estimate | $4,114 a year |
City or highway — who is this car for
The 2003 Infiniti QX4 gives up 5 mpg in town: 19 on the highway against 14 in the city, $722 a year if every mile were city driving.
| Measure | Value | Reading |
|---|---|---|
| City (2003) | 14 mpg | $2,743 a year if you only drive in town |
| Highway | 19 mpg | $2,021 a year if you mostly commute |
| Gap | +5 mpg (36%) | Wide — this car dislikes traffic |
How the QX4 changed over the years
The QX4 peaked in 2003 at 16 mpg (14 city, 19 highway) and was at its thirstiest in 2002 at 15 — 1 mpg apart, or $160 a year in fuel between buying one year and the other.
| Model year | Combined | City / Highway | Engines offered | Fuel per year |
|---|---|---|---|---|
| 2003 | 14 / 19 | 1 | $2,400 | |
| 2002 | 14 / 18 | 1 | $2,560 | |
| 2001 | 14 / 18 | 1 | $2,560 | |
| 2000 | 13 / 17 | 1 | $2,560 | |
| 1999 | 13 / 17 | 1 | $2,560 | |
| 1998 | 13 / 17 | 1 | $2,560 | |
| 1997 | 14 / 17 | 1 | $2,560 |
MPG is a number. Dollars per year is the answer.
- Fuel profile built from your actual mileage and local prices
- Fuel tracker: what you really spend, month by month
- Insurance and fuel folded into 5-year cost to own
- Compare any two cars on total cost, not sticker price
- No ads, no tracking — and much more
How we count
This page rests on 7 EPA ratings of the Infiniti QX4 — 2 engines across 1997–2003. 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 $4,114. Full method.
Frequently asked questions
What mpg does the 2003 Infiniti QX4 get?
16 mpg combined, 14 city and 19 highway, per EPA. Across every year since 1997 the QX4 has averaged 15.1 mpg.
Is the 2003 QX4 more efficient than the 2002?
Yes: 16 against 15 mpg combined, about $160 a year less to run.
Which QX4 year has the best gas mileage?
The 2003, at 16 mpg combined (14 city, 19 highway), which is also the latest model year we hold.
Does the QX4 get better gas mileage than the Jeep Liberty?
No: 16 mpg for the 2003 QX4 against 17.8 for the 2004 Jeep Liberty, about $243 a year more to run.
Mark ForCar as a preferred source and our data shows up first in your Google results. One click, no account.