Against 520 other 4-cyl cars rated 2017–2019, the ATS trails their 27.3 mpg average by 3.3 mpg, about $193 a year. Averaged over the years each was sold, the most economical engine since 2013, the 2.5L 4-cyl (2013–2017), does 25.8 mpg and the thirstiest, the 3.6L 6-cyl (2013–2019), 23: $182 a year apart.
Every Cadillac ATS engine, compared
Yearly cost assumes 12,000 miles at $3.20 a gallon.
| Engine | Combined | City / Highway | Years | Fuel per year |
|---|---|---|---|---|
| 2.5L 4-cyl | 21.8 / 32 | 2013–2017 | $1,488 | |
| 2L 4-cyl | 22 / 30.5 | 2018–2019 | $1,536 | |
| 3.6L 6-cyl | 19.1 / 28.4 | 2013–2019 | $1,670 |
What that actually costs
Against its rivals in the same model years, the Toyota Corolla gets 39.3 mpg, the Lexus IS 23.8 mpg and the Acura TLX 25.5 mpg, next to 24 mpg for the 2019 ATS.
| Measure | Value |
|---|---|
| Cost per mile (2019) | $0.133 |
| Fuel per year | $1,600 |
| Fuel over five years | $8,000 |
| Against other 4-cyl cars, 2017–2019 | +$193 a year |
| EPA's own estimate | $2,668 a year |
City or highway — who is this car for
The 2019 Cadillac ATS gives up 9 mpg in town: 29.5 on the highway against 20.5 in the city, $571 a year if every mile were city driving.
| Measure | Value | Reading |
|---|---|---|
| City (2019) | 20.5 mpg | $1,873 a year if you only drive in town |
| Highway | 29.5 mpg | $1,302 a year if you mostly commute |
| Gap | +9 mpg (44%) | Wide — this car dislikes traffic |
How the ATS changed over the years
The ATS peaked in 2017 at 25 mpg (21 city, 31 highway) and was at its thirstiest in 2015 at 23.5 — 1.5 mpg apart, or $98 a year in fuel between buying one year and the other. The 2019 car does 24.
| Model year | Combined | City / Highway | Engines offered | Fuel per year |
|---|---|---|---|---|
| 2019 | 20.5 / 29.5 | 2 | $1,600 | |
| 2018 | 21 / 30.5 | 2 | $1,567 | |
| 2017 | 21 / 31 | 2 | $1,536 | |
| 2016 | 21 / 30.5 | 2 | $1,536 | |
| 2015 | 19.5 / 29.5 | 2 | $1,634 | |
| 2014 | 20 / 29.5 | 2 | $1,600 | |
| 2013 | 20.5 / 29.5 | 2 | $1,600 |
MPG is a number. Dollars per year is the answer.
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How we count
This page rests on 14 EPA ratings of the Cadillac ATS — 3 engines across 2013–2019. 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 $2,668. Full method.
Frequently asked questions
What mpg does the 2019 Cadillac ATS get?
24 mpg combined, 20.5 city and 29.5 highway, per EPA; its 2 versions that year range from 23 to 25. Across every year since 2013 the ATS has averaged 24.3 mpg.
Is the 2019 ATS more efficient than the 2018?
About the same: 24 against 24.5 mpg combined.
Which ATS year has the best gas mileage?
The 2017, at 25 mpg combined (21 city, 31 highway).
Does the ATS get better gas mileage than the Toyota Corolla?
No: 24 mpg for the 2019 ATS against 39.3 for the 2020 Toyota Corolla, about $623 a year more to run.
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