The Infiniti M37 does 21 mpg combined (18 city, 26 highway), which works out to about $1,829 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 M37 engine, compared
The Infiniti M37 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 |
|---|---|---|---|---|
| 3.7L 6-cyl | 18 / 26 | 2011–2013 | $1,829 |
What that actually costs
The Infiniti M37 burns a gallon every 21 miles, so 12,000 miles takes about 571 gallons a year. At $3.20 that is what the table below adds up to.
| Measure | Value |
|---|---|
| Cost per mile | $0.152 |
| Fuel per year | $1,829 |
| Fuel over five years | $9,145 |
| Against other V6 cars | −$101 a year |
| EPA's own estimate | $3,650 a year |
City or highway — who is this car for
The Infiniti M37 gives up 8 mpg the moment you leave the motorway — 26 out there against 18 in town, a 44% drop worth $656 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 | 18 mpg | $2,133 a year if you only drive in town |
| Highway | 26 mpg | $1,477 a year if you mostly commute |
| Gap | +8 mpg (44%) | Wide — this car dislikes traffic |
How the M37 changed over the years
Combined figure across the 3 model years the M37 was rated in, all of them at 21 mpg.
| Model year | Combined | City / Highway | Engines offered | Fuel per year |
|---|---|---|---|---|
| 2013 | 18 / 26 | 1 | $1,829 | |
| 2012 | 18 / 26 | 1 | $1,829 | |
| 2011 | 18 / 26 | 1 | $1,829 |
MPG is a number. Dollars per year is the answer.
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How we count
This page rests on 3 EPA ratings of the Infiniti M37 — 1 engine across 2011–2013. 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 $3,650. Full method.
Frequently asked questions
What mpg does the Infiniti M37 get?
21 mpg combined on average — 18 in the city and 26 on the highway, per EPA ratings across 2011–2013.
How much does a Infiniti M37 cost in fuel per year?
About $1,829 at 12,000 miles and $3.20 a gallon — roughly $9,145 over five years, or 0.152 dollars a mile.
Which M37 engine is the most economical?
The 3.7L 6-cyl at 21 mpg.
Is the M37 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 M37 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 M37 is $3,650 against the $1,829 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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