2018 Audi S5 Cabriolet 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 Audi S5 Cabriolet.

The 2018 Audi S5 Cabriolet runs on premium gasoline and is in the Subcompact 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 Audi S5 Cabriolet is, we have the information you need.

🛣 How Many Miles per Gallon (MPG) Does a 2018 Audi S5 Cabriolet Get?

First off, the most commonly asked question. A 2018 Audi S5 Cabriolet gets up to 20 miles per gallon in the city, and 29 miles per gallon on the highway.

The combined average MPG for the 2018 Audi S5 Cabriolet is 23 miles per gallon.

💵 What is the Average Yearly Fuel Cost for a 2018 Audi S5 Cabriolet?

The estimated fuel costs for the 2018 Audi S5 Cabriolet is $3,200 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 Audi S5 Cabriolet to an average vehicle over 5 years, you will spend $4,500 more on fuel.

🛢 How Many Barrels of Petroleum Does a 2018 Audi S5 Cabriolet Consume?

The 2018 Audi S5 Cabriolet will consume roughly 13 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 Audi S5 Cabriolet Emit?

For every mile driven, the 2018 Audi S5 Cabriolet will emit 384 grams of CO2, which is about 5,760,000 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 196 trees would be needed to offset emissions from the 2018 Audi S5 Cabriolet.


The table below covers all of the miles per gallon, engine specifications, and emission details we have for the 2018 Audi S5 Cabriolet.

City MPG 20
Highway MPG 29
Combined MPG 23
Save/Spend vs Average Car Spend $4,500
Fuel Cost $3,200
Fuel Type 1 Premium
Barrels of Petroleum 13
Grams of CO2 5,760,000
Trees Needed to Offset 274
Drive All-Wheel Drive
Cylinders 6
Transmission Automatic (AM-S8)
Vehicle Class Subcompact Cars
Start/Stop? No
Supercharged? No
Turbocharged? Yes

Related Audi Models from 2018

If you're interested in other Audi 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
RS 3 22
R8 Spyder AWD 17
A8 L 22
RS 5 21
S8 18
A6 quattro 26
Q3 23
SQ5 21
R8 RWD 18
S5 24
S4 24
A5 Sportback quattro 27
A6 28
A5 Cabriolet quattro 27
Q5 25
A6 quattro 23
R8 AWD 17
A4 quattro 27
A7 quattro 23
A8 L 19


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.

Link To or Reference This Page

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If you found the data or information on this page useful in your research, please use the tool below to properly cite or reference MPG Buddy as the source. We appreciate your support!

  • "2018 Audi S5 Cabriolet MPG and Fuel Economy". MPG Buddy. Accessed on May 28, 2023. http://mpgbuddy.com/cars/audi/s5-cabriolet/2018.

  • "2018 Audi S5 Cabriolet MPG and Fuel Economy". MPG Buddy, http://mpgbuddy.com/cars/audi/s5-cabriolet/2018. Accessed 28 May, 2023

  • 2018 Audi S5 Cabriolet MPG and Fuel Economy. MPG Buddy. Retrieved from http://mpgbuddy.com/cars/audi/s5-cabriolet/2018.