Cadillac averages 19.5 mpg combined across 26 petrol and diesel models (1984–2026). The best on record does 33 mpg, the thirstiest 13 — a yearly fuel gap of about $1,790. Its 4 electric models sit apart at 89.4 MPGe — 37.7 kWh per 100 miles, about $769 a year to charge, which is $1,200 less than the average Cadillac costs to fuel.
What that actually costs
What a Cadillac costs to feed, at 12,000 miles a year and $3.20 a gallon.
| Measure | Value |
|---|---|
| Average combined | 19.5 mpg |
| Fuel per year | $1,969 |
| Most frugal on record | 33 mpg — $1,164 a year |
| Thirstiest on record | 13 mpg — $2,954 a year |
| Its electric models | 89.4 MPGe — $769 a year to charge |
Cadillac models by gas mileage
From the most frugal down. The yearly figure is what the fuel actually costs at 12,000 miles.
| Model | Average mpg | Best / Worst engine | Fuel per year |
|---|---|---|---|
| Cadillac ELR | 33 / 32 | $1,174 | |
| Cadillac XT4 | 26 / 26 | $1,477 | |
| Cadillac ATS | 26 / 22 | $1,580 | |
| Cadillac CT4 | 27 / 19 | $1,641 | |
| Cadillac CT6 | 28 / 17 | $1,707 | |
| Cadillac XT5 | 24 / 21 | $1,714 | |
| Cadillac Cimarron | 25 / 19 | $1,722 | |
| Cadillac CT5 | 27 / 15 | $1,753 | |
| Cadillac XT6 | 23 / 20 | $1,761 | |
| Cadillac XTS | 22 / 21 | $1,794 | |
| Cadillac CTS | 25 / 16 | $1,930 | |
| Cadillac Fleetwood | 24 / 17 | $2,032 | |
| Cadillac STS | 21 / 18 | $2,032 | |
| Cadillac Deville | 23 / 17 | $2,087 | |
| Cadillac Eldorado | 21 / 17 | $2,098 | |
| Cadillac Seville | 21 / 17 | $2,098 | |
| Cadillac Catera | 19 / 18 | $2,110 | |
| Cadillac DTS | 18 / 18 | $2,133 | |
| Cadillac XLR | 18 / 18 | $2,133 | |
| Cadillac Brougham | 21 / 16 | $2,133 | |
| Cadillac SRX | 21 / 16 | $2,182 | |
| Cadillac Escalade | 23 / 13 | $2,233 | |
| Cadillac Hearse | 21 / 14 | $2,313 | |
| Cadillac 60 Special | 17 / 16 | $2,356 | |
| Cadillac Allante | 17 / 15 | $2,385 | |
| Cadillac Escalade ESV | 17 / 13 | $2,595 |
The electric Cadillacs, measured differently
Cadillac has 4 models that never visit a filling station, averaging 89.4 MPGe. That figure looks four times better than the 19.5 mpg the petrol Cadillacs manage, but the two are not the same unit — so we keep them apart and price the electric ones in kilowatt-hours.
| Model | MPGe | kWh / 100 mi | Charging per year |
|---|---|---|---|
| Cadillac Optiq | 32.1 | $655 | |
| Cadillac Lyriq | 37.2 | $759 | |
| Cadillac Vistiq | 39.2 | $800 | |
| Cadillac Celestiq | 41.6 | $849 |
MPG is a number. Dollars per year is the answer.
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How we count
Cadillac rests on 363 EPA ratings covering 26 models from 1984 to 2026, plus 4 electric ones counted separately in MPGe. The laboratory numbers are EPA's and go in unchanged; the money is ours, at 12,000 miles a year and $3.20 a gallon. Full method.
Frequently asked questions
What is the average Cadillac gas mileage?
19.5 mpg combined across 26 models and 363 EPA ratings, from 1984 to 2026 — 42 model years in one figure, which is why it sits below what a new Cadillac does today.
Which Cadillac model is the most economical?
The Cadillac ELR at 32.7 mpg, about $1,174 a year in fuel, against the Escalade ESV at 14.8 mpg and $2,595 — a gap of $1,421 a year between the two ends of the same badge.
How much does a Cadillac cost to run?
About $1,969 a year in fuel, at 12,000 miles and $3.20 a gallon. Over five years that is $9,845, before a single service.
Does Cadillac make anything electric?
Yes — 4 models, rated 89.4 MPGe rather than in mpg, which works out to 37.7 kWh per 100 miles and roughly $769 a year at the socket. That is $1,200 less than the average petrol Cadillac, though the two ratings are not in the same unit.
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