Cadillac · Midsize cars · Gasoline
Cadillac CT5: MPG and annual fuel cost, 2026
At 26 MPG combined, the Cadillac CT5 sits 4 MPG below the midsize cars median of 30, which makes it tied for 21st of 31 midsize cars, in the lower half.
- 26MPG combinedtied 21st of 31 in class
- $3,150a year in fueltied 21st of 31 in class
- 346g/mile CO2
Where it stands
Compared only with the gasoline models of its class it is tied for 9th of 14 gasoline midsize cars, in the lower half. The median of that narrower group is 27 MPG, against 30 MPG for all midsize cars together.
Among all gasoline models of the year, regardless of size, it is tied for 53rd of 180 gasoline models, in the upper half.
Within the 8 Cadillac models rated for 2026 it is tied for 5th on combined rating; the median of the make's line-up is 53.5 MPG.
In its class, just ahead of it is the Alfa Romeo Giulia at 27 MPG and just behind it is the BMW 5 Series Plug-in hybrid at 25 MPG.
Fuel cost and CO2
Assuming 15,000 miles a year with 55% of them in the city and premium gasoline at $5.48 per gallon, fuelling the most efficient version comes to about $3,150 a year. That is $650 more than the midsize cars median of $2,500.
Tailpipe CO2 is 346 g/mile, 77 g/mile above the midsize cars median of 269.
Rated versions
Its city rating is 22 and its highway rating 31: the highway figure is 9 higher. 8 versions are rated for 2026. The most efficient, CT5: 2.0 L, 4 cyl, Automatic (S10), RWD, gets 26 MPG; the least efficient listed, CT5 V: 6.2 L, 8 cyl, Manual 6-spd, RWD, gets 15 MPG, a gap of 11 MPG. With the file's assumptions that gap is worth about $2,350 a year in fuel.
| Version | Combined MPG | City MPG | Highway MPG | Annual fuel cost | CO2 g/mile |
|---|---|---|---|---|---|
| CT5: 2.0 L, 4 cyl, Automatic (S10), RWD | 26 | 22 | 31 | $3,150 | 346 |
| CT5 AWD: 2.0 L, 4 cyl, Automatic (S10), AWD | 24 | 21 | 30 | $3,400 | 370 |
| CT5: 3.0 L, 6 cyl, Automatic (S10), RWD | 22 | 19 | 28 | $3,750 | 399 |
| CT5 AWD: 3.0 L, 6 cyl, Automatic (S10), AWD | 21 | 18 | 27 | $3,900 | 418 |
| CT5 V: 3.0 L, 6 cyl, Automatic (S10), RWD | 21 | 18 | 27 | $3,900 | 423 |
| CT5 V AWD: 3.0 L, 6 cyl, Automatic (S10), AWD | 20 | 17 | 26 | $4,100 | 445 |
| CT5 V: 6.2 L, 8 cyl, Automatic (S10), RWD | 15 | 13 | 20 | $5,500 | 580 |
| CT5 V: 6.2 L, 8 cyl, Manual 6-spd, RWD | 15 | 13 | 20 | $5,500 | 587 |
Year by year
The Cadillac CT5 is in the data for 7 of the 8 model years from 2019 to 2026. The headline rating did not move between 2020 and 2026: 26 MPG both times. The highest figure came in 2022, at 27. The number of rated versions grew from 6 to 8.
| Model year | Versions | Best MPG | Lowest MPG | Fuel cost | CO2 g/mi | Class median |
|---|---|---|---|---|---|---|
| 2026 | 8 | 26 | 15 | $3,150 | 346 | 30 |
| 2025 | 8 | 26 | 15 | $3,150 | 341 | 29 |
| 2024 | 8 | 27 | 15 | $3,050 | 333 | 30 |
| 2023 | 8 | 27 | 15 | $3,050 | 333 | 28 |
| 2022 | 8 | 27 | 15 | $3,050 | 333 | 28 |
| 2021 | 6 | 26 | 21 | $3,150 | 337 | 28.5 |
| 2020 | 6 | 26 | 20 | $3,150 | 337 | 28 |
Similar models
| Model | Powertrain | Combined MPG | Annual fuel cost | Model year |
|---|---|---|---|---|
| Alfa Romeo Giulia | Gasoline | 27 | $3,050 | 2026 |
| Volkswagen Golf/GTI | Gasoline | 27 | $2,500 | 2026 |
| BMW 5 Series Plug-in hybrid | Plug-in hybrid | 25 | $3,300 | 2026 |
| Mercedes-Benz E-Class Hybrid | Hybrid | 28 | $2,950 | 2026 |
| Mercedes-Benz E-Class Plug-in hybrid | Plug-in hybrid | 24 | $3,400 | 2026 |
Compare and rank
Rankings: Midsize cars, Gasoline, Cadillac, Gasoline midsize cars.
Data: US EPA and DOE, as prepared in methods and data.