The Buick Allure does 20.4 mpg combined (16.9 city, 26.6 highway), which works out to about $1,882 a year in fuel at $3.20 a gallon and 12,000 miles. Engine choice matters more than you'd think: 3.8L 6-cyl does 21 mpg while 5.3L 8-cyl does 19 — a difference of $192 a year. Against other V6 cars it sits above the average of 19.9 mpg.
Every Buick Allure engine, compared
Gas mileage on the Buick Allure ranges from 21 down to 19 depending on which engine sits under the bonnet — a spread of $192 a year across 2 versions of the same car. Picking the right one often saves more fuel than picking a different car altogether. Yearly cost assumes 12,000 miles at $3.20 a gallon.
| Engine | Combined | City / Highway | Years | Fuel per year |
|---|---|---|---|---|
| 3.8L 6-cyl | 17.2 / 27.6 | 2005–2009 | $1,829 | |
| 5.3L 8-cyl | 16 / 24 | 2008–2009 | $2,021 |
What that actually costs
The Buick Allure burns a gallon every 20.4 miles, so 12,000 miles takes about 588 gallons a year. At $3.20 that is what the table below adds up to.
| Measure | Value |
|---|---|
| Cost per mile | $0.157 |
| Fuel per year | $1,882 |
| Fuel over five years | $9,410 |
| Against other V6 cars | −$48 a year |
| EPA's own estimate | $3,143 a year |
City or highway — who is this car for
The Buick Allure gives up 9.7 mpg the moment you leave the motorway — 26.6 out there against 16.9 in town, a 57% drop worth $828 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 | 16.9 mpg | $2,272 a year if you only drive in town |
| Highway | 26.6 mpg | $1,444 a year if you mostly commute |
| Gap | +9.7 mpg (57%) | Wide — this car dislikes traffic |
How the Allure changed over the years
The Allure peaked in 2007 at 21 mpg (17 city, 27 highway) and was at its thirstiest in 2009 at 20 — 1 mpg apart, or $91 a year in fuel between buying one year and the other. The 2009 car does 20. Jumps usually mark a new generation or a new engine; dips often mean a heavier body or added all-wheel drive.
| Model year | Combined | City / Highway | Engines offered | Fuel per year |
|---|---|---|---|---|
| 2009 | 16.5 / 26 | 2 | $1,920 | |
| 2008 | 16.5 / 26 | 2 | $1,920 | |
| 2007 | 17 / 27 | 1 | $1,829 | |
| 2006 | 17 / 28 | 1 | $1,829 | |
| 2005 | 18 / 27 | 1 | $1,829 |
MPG is a number. Dollars per year is the answer.
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How we count
This page rests on 7 EPA ratings of the Buick Allure — 2 engines across 2005–2009. 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 $3,143. Full method.
Frequently asked questions
What mpg does the Buick Allure get?
20.4 mpg combined on average — 16.9 in the city and 26.6 on the highway, per EPA ratings across 2005–2009.
How much does a Buick Allure cost in fuel per year?
About $1,882 at 12,000 miles and $3.20 a gallon — roughly $9,410 over five years, or 0.157 dollars a mile.
Which Allure engine is the most economical?
The 3.8L 6-cyl at 21 mpg, against 19 for the 5.3L 8-cyl — a difference of about $192 a year.
Is the Allure 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 Allure figures?
No — they are EPA laboratory ratings, the same ones printed on the window sticker, and EPA's own annual fuel estimate for the Buick Allure is $3,143 against the $1,882 we compute at 12,000 miles. Expect a little worse in practice: the spread between the 21 and 19 mpg versions of this car is smaller than the spread between two drivers of the same one.
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