2026 · Midsize Car · Gas

2026 Cadillac CT5 MPG & fuel economy

The 2026 Cadillac CT5 is a midsize car offered in 8 EPA-rated configurations. The most efficient version returns 26 MPG combined (22 city / 31 highway) on premium gasoline. Across the lineup, combined ratings range from 15 to 26 MPG. Efficiency is unchanged from the 2025 model. Among 31 midsize cars rated for 2026, it ranks 25th for lowest fuel cost. At 15,000 miles a year with $3.95/gal premium gas, it costs about $2,279 a year to fuel.

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Combined 26 MPG 22 MPG city · 31 MPG hwy

Driving range — not published for this model

Your fuel cost $2,279 15,000 mi/yr · $15.19 per 100 mi

Class rank, 2026 #25 of 31 Midsize Cars by fuel cost

What will it cost you?

Your mileage and prices are saved and used across the site.

Miles per year Premium gas $/gal

Fuel average

The 2026 Cadillac CT5's fuel average is 11.1 km/L (9.0 L/100 km), or 26 MPG combined: 9.4 km/L in the city and 13.2 km/L on the highway.

	MPG	km/L	L/100 km
City	22	9.4	10.7
Highway	31	13.2	7.6
Combined	26	11.1	9.0

How it ranks among 2026 Midsize Cars

Full class ranking →

1Tesla Model 3139 MPGe $656
2Lexus ES EV127 MPGe $729
3Toyota Prius57 MPG $816
4Hyundai Elantra Hybrid54 MPG $861
5Toyota Camry Hybrid51 MPG $912
···
25Cadillac CT526 MPG $2,279
···
31Audi RS Hybrid16 MPG $3,703

2026 CT5Other midsize carsClass median: $1,714/yr

Annual fuel cost at 15,000 miles and default prices; shorter bars cost less.

CT5 MPG across model years

Full history →

8 EPA-rated configurations

Configuration	Type	City	Hwy	Combined	Range	Your cost / yr
RWD · 2.0L 4-cyl turbo · 10-speed automatic CT5	Gas	22 MPG	31 MPG	26 MPG	—	$2,279
AWD · 2.0L 4-cyl turbo · 10-speed automatic CT5 AWD	Gas	21 MPG	30 MPG	24 MPG	—	$2,469
RWD · 3.0L 6-cyl turbo · 10-speed automatic CT5	Gas	19 MPG	28 MPG	22 MPG	—	$2,693
RWD · 3.0L 6-cyl turbo · 10-speed automatic CT5 V	Gas	18 MPG	27 MPG	21 MPG	—	$2,821
AWD · 3.0L 6-cyl turbo · 10-speed automatic CT5 AWD	Gas	18 MPG	27 MPG	21 MPG	—	$2,821
AWD · 3.0L 6-cyl turbo · 10-speed automatic CT5 V AWD	Gas	17 MPG	26 MPG	20 MPG	—	$2,962
RWD · 6.2L 8-cyl supercharged · 10-speed automatic CT5 V	Gas	13 MPG	20 MPG	15 MPG	—	$3,950
RWD · 6.2L 8-cyl supercharged · 6-speed manual CT5 V	Gas	13 MPG	20 MPG	15 MPG	—	$3,950

Specs (most efficient configuration)

Fuel: Premium gasoline
Engine / motor: 2.0L 4-cyl turbo
Transmission: 10-speed automatic
Drivetrain: RWD
Passenger volume: 99 cu ft
Cargo volume: 11 cu ft
Tailpipe CO₂: 346 g/mi
EPA fuel economy score: 5/10
EPA greenhouse gas score: 5/10

2026 Cadillac CT5 vs. rivals

vs Alfa Romeo Giulia 27 MPG · $2,194/yr Giulia saves $84/yr vs Audi A5 26 MPG · $2,279/yr Same fuel cost vs Mercedes-Benz E-Class Hybrid 28 MPG · $2,116/yr E-Class Hybrid saves $163/yr vs Volvo S90 Hybrid 28 MPG · $2,116/yr S90 Hybrid saves $163/yr vs Audi A6 23 MPG · $2,576/yr CT5 saves $297/yr vs BMW M Plug-in Hybrid 47 MPGe + 14 MPG · $2,650/yr CT5 saves $371/yr vs BMW 5 Series Hybrid 31 MPG · $1,911/yr 5 Series Hybrid saves $368/yr vs Lexus LS 21 MPG · $2,821/yr CT5 saves $543/yr vs Mercedes-Benz E-Class Plug-in Hybrid 60 MPGe + 24 MPG · $1,793/yr E-Class Plug-in Hybrid saves $486/yr vs Audi S5 23 MPG · $2,576/yr CT5 saves $297/yr vs BMW 5 Series Plug-in Hybrid 68 MPGe + 25 MPG · $1,714/yr 5 Series Plug-in Hybrid saves $565/yr vs Audi RS Hybrid 16 MPG · $3,703/yr CT5 saves $1,424/yr

Compare the 2026 CT5

With any other car from any year, including other CT5 model years. Type a year to jump, e.g. "2015 Accord".

Frequently asked questions

What is the gas mileage of the 2026 Cadillac CT5?

Up to 26 MPG combined (22 city / 31 highway); ratings range from 15 to 26 MPG depending on configuration.

What fuel does the 2026 Cadillac CT5 use?

Premium gasoline (premium is required or recommended by the manufacturer).

What is the fuel average in km/L for the 2026 Cadillac CT5?