The Infiniti G25 does 23 mpg combined (20 city, 29 highway), which works out to about $1,670 a year in fuel at $3.20 a gallon and 12,000 miles. Against other V6 cars it sits above the average of 19.9 mpg.
Every Infiniti G25 engine, compared
The Infiniti G25 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 |
|---|---|---|---|---|
| 2.5L 6-cyl | 20 / 29 | 2011–2012 | $1,670 |
What that actually costs
The Infiniti G25 burns a gallon every 23 miles, so 12,000 miles takes about 522 gallons a year. At $3.20 that is what the table below adds up to.
| Measure | Value |
|---|---|
| Cost per mile | $0.139 |
| Fuel per year | $1,670 |
| Fuel over five years | $8,350 |
| Against other V6 cars | −$260 a year |
| EPA's own estimate | $3,350 a year |
City or highway — who is this car for
The Infiniti G25 gives up 9 mpg the moment you leave the motorway — 29 out there against 20 in town, a 45% drop worth $596 a year. A wide gap punishes stop-and-start traffic; a narrow one means the car doesn't care where you drive it.
| Measure | Value | Reading |
|---|---|---|
| City | 20 mpg | $1,920 a year if you only drive in town |
| Highway | 29 mpg | $1,324 a year if you mostly commute |
| Gap | +9 mpg (45%) | Wide — this car dislikes traffic |
How the G25 changed over the years
Combined figure across the 2 model years the G25 was rated in, all of them at 23 mpg.
| Model year | Combined | City / Highway | Engines offered | Fuel per year |
|---|---|---|---|---|
| 2012 | 20 / 29 | 1 | $1,670 | |
| 2011 | 20 / 29 | 1 | $1,670 |
MPG is a number. Dollars per year is the answer.
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How we count
This page rests on 2 EPA ratings of the Infiniti G25 — 1 engine across 2011–2012. 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 $3,350. Full method.
Frequently asked questions
What mpg does the Infiniti G25 get?
23 mpg combined on average — 20 in the city and 29 on the highway, per EPA ratings across 2011–2012.
How much does a Infiniti G25 cost in fuel per year?
About $1,670 at 12,000 miles and $3.20 a gallon — roughly $8,350 over five years, or 0.139 dollars a mile.
Which G25 engine is the most economical?
The 2.5L 6-cyl at 23 mpg.
Is the G25 good on fuel compared with similar cars?
Against other V6 cars it sits above the average of 19.9 mpg, computed across 4940 ratings.
Are these real-world G25 figures?
No — they are EPA laboratory ratings, the same ones printed on the window sticker, and EPA's own annual fuel estimate for the Infiniti G25 is $3,350 against the $1,670 we compute at 12,000 miles. Expect a little worse in practice: the spread between the city and highway figures is smaller than the spread between two drivers of the same one.
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