2015 Mitsubishi MirageEnlarge Photo
Many new cars get good gas mileage, spread across a wide swath of price points.
But for many consumers, gas mileage isn't just about saving fuel--and, for some, cutting carbon emissions--it's about saving money.
So which cars offer the cheapest gas mileage?
To find out, we compared the Manufacturer's Suggested Retail Prices for a variety of models (plus their mandatory delivery fees) with their fuel-efficiency ratings from the EPA's FuelEconomy.gov website.
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We not only looked at cars with high gas mileage, but also cars that are very cheap, which gave us this Top 10 list of new cars with the cheapest gas mileage.
We used the highest combined fuel-economy rating for each model, although in some cases that corresponds to variants with optional equipment.
In those cases, we selected the version that had the best fuel economy-to-cost ratio. Pricing and specifications for each model are detailed in the descriptions below.
2015 Mitsubishi Mirage
2015 Mitsubishi MirageEnlarge Photo
2015 Mitsubishi Mirage: $372 per mpg
The Mitsubishi Mirage tops the list when it comes to inexpensive gas mileage.
It achieves a best of 40 mpg combined (37 mpg city, 44 mpg highway) with its 1.2-liter three-cylinder engine, and the optional CVT automatic.
The CVT adds $1,100 to the Mirage's $13,805 base price (including destination), bringing the total to $14,905.
Note that there is no 2016 Mirage, but the model will return for 2017 with several updates, including an available sedan body style. EPA-rated fuel economy shouldn't drastically change.
2016 Toyota Prius C
2016 Toyota Prius CEnlarge Photo
2016 Toyota Prius C: $407 per mpg
The Prius C is no longer Toyota's most fuel-efficient hybrid, but it remains the cheapest--and that counts for a lot here.
The subcompact hybrid is rated at 50 mpg combined (53 mpg city, 46 mpg highway).
That comes with a base price of $20,395--a combination that gets the Prius C to second place on this list.
While the larger Prius hatchback was just redesigned, the Prius C's future may be uncertain, as low gas prices have led Toyota to question its strategy of having a "family" of Prius models.
2016 Chevrolet Spark
2016 Chevrolet SparkEnlarge Photo
2016 Chevrolet Spark: $418 per mpg
The redesigned 2016 Chevrolet Spark went on sale in some areas in December, after debuting at the 2015 New York Auto Show last year.
It achieves maximum mileage of 35 mpg combined (31 mpg city, 41 mpg highway) with its sole engine option--a 1.4-liter four-cylinder--and the optional CVT automatic.
Selecting the CVT instead of the standard five-speed manual adds $1,100 to the Spark's base price, bringing the total to $14,635.
2016 Nissan Versa
2016 Nissan VersaEnlarge Photo
2016 Nissan Versa sedan: $425 per mpg
Nissan offers Versa buyers quite a few configurations of body style and powertrain, but when it comes to fuel economy, one proves to be a better value than the others.
All Versa sedan models use a 1.6-liter four-cylinder engine, and with the optional CVT the Versa gets 35 mpg combined (31 mpg city, 40 mpg highway).
But getting the CVT requires upgrading from the base Versa S to the SE--inflating the base price by $2,050, to $14,875.
That's still a slightly better dollars-per-MPG value than a base Versa S, which returns 30 mpg combined (27 mpg city, 36 mpg highway) with its standard five-speed manual.
With the lower base price, that works out to $427 per mpg, just a tad higher than the more expensive--but more efficient--model.
2016 Smart ForTwo minicar, Portland, Oregon, Aug 2015Enlarge Photo
2016 Smart ForTwo: $440 per mpg
The all-new Smart ForTwo is a much better car than its ancient predecessor, which dated back to the 1990s, but its fuel economy has stayed pretty much the same.
That's despite the seeming expectations of other drivers and onlookers, who seem to assume that the 8.5-foot-long car gets 60, 70, even 80 mpg due to its tiny size.
The base ForTwo Pure, at $15,400 including delivery, comes with a five-speed manual gearbox and is rated at 35 mpg combined.
You can boost that to 36 mpg combined by adding the $990 dual-clutch automatic transmission, but the base manual version actually has a better price-per-mpg ratio.