2018 Cadillac XTS MPG and Fuel Economy

On this page, you will find a complete guide to the miles per gallon and fuel efficiency data for the 2018 Cadillac XTS.

The 2018 Cadillac XTS runs on regular gasoline and is in the Large Cars car class.

Whether you are considering a purchase of the car, or just wanting to find out how economical and environmentally friendly (or un-friendly) your 2018 Cadillac XTS is, we have the information you need.

🛣 How Many Miles per Gallon (MPG) Does a 2018 Cadillac XTS Get?

First off, the most commonly asked question. A 2018 Cadillac XTS gets up to 19 miles per gallon in the city, and 28 miles per gallon on the highway.

The combined average MPG for the 2018 Cadillac XTS is 22 miles per gallon.

💵 What is the Average Yearly Fuel Cost for a 2018 Cadillac XTS?

The estimated fuel costs for the 2018 Cadillac XTS is $2,850 per year.

That value has been estimated by government regulators based on 15,000 miles driven per year, using regular gasoline, and a split of 55% city driving and 45% highway driving.

If you were to compare a 2018 Cadillac XTS to an average vehicle over 5 years, you will spend $2,750 more on fuel.

🛢 How Many Barrels of Petroleum Does a 2018 Cadillac XTS Consume?

The 2018 Cadillac XTS will consume roughly 14 barrels of petroleum per year, using the standard estimate of 15,000 miles per year.

The majority of the world's petroleum is sourced from countries like Saudi Arabia, Russia, Iraq, and the United States.

💨 How Many Grams of CO2 Does a 2018 Cadillac XTS Emit?

For every mile driven, the 2018 Cadillac XTS will emit 404 grams of CO2, which is about 6,060,000 grams of CO2 per year.

🌳 To help you understand the impact of this, a normal tree will absorb around 21,000 grams of CO2 per year. This means that roughly 207 trees would be needed to offset emissions from the 2018 Cadillac XTS.


The table below covers all of the miles per gallon, engine specifications, and emission details we have for the 2018 Cadillac XTS.

City MPG 19
Highway MPG 28
Combined MPG 22
Save/Spend vs Average Car Spend $2,750
Fuel Cost $2,850
Fuel Type 1 Regular
Barrels of Petroleum 14
Grams of CO2 6,060,000
Trees Needed to Offset 289
Drive Front-Wheel Drive
Cylinders 6
Transmission Automatic (S6)
Vehicle Class Large Cars
Start/Stop? No
Supercharged? No
Turbocharged? No

Related Cadillac Models from 2018

If you're interested in other Cadillac models from 2018, you can find them in the table below. You can click the model link to find miles per gallon and emission information for that model.

Model Combined MPG
XTS Limo 17
CTS-V 17
CT6 Plug-In 25
ATS 24
ATS-V 19
CTS 19
XT5 AWD 21
CTS 25
Escalade 4WD 17
XTS Hearse 17
CTS 24
CT6 25
CT6 AWD 21
ATS 25
CT6 AWD 21


Ratings were provided by the manufacturer to the U.S. Department of Energy, which is where we sourced the data. Be advised that manufacturers may have upgraded, downgraded, or changed these ratings following the compilation of this data.

MPG Buddy does not guarantee the accuracy of this data, nor are we liable for any decisions made by referencing this data. Make sure to contact the specific car manufacturer to confirm accuracy.

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  • "2018 Cadillac XTS MPG and Fuel Economy". MPG Buddy. Accessed on June 28, 2022. http://mpgbuddy.com/cars/cadillac/xts/2018.

  • "2018 Cadillac XTS MPG and Fuel Economy". MPG Buddy, http://mpgbuddy.com/cars/cadillac/xts/2018. Accessed 28 June, 2022

  • 2018 Cadillac XTS MPG and Fuel Economy. MPG Buddy. Retrieved from http://mpgbuddy.com/cars/cadillac/xts/2018.