2008 Audi A8 L MPG and Fuel Economy

On this page, you will find a complete guide to the miles per gallon and fuel efficiency data for the 2008 Audi A8 L.

The 2008 Audi A8 L has 2 model options: Automatic (S6) 8-cyl, 4.2 L and Automatic (S6) 12-cyl, 6.0 L.

The 2008 Audi A8 L Automatic (S6) 8-cyl, 4.2 L runs on premium gasoline and is in the Large Cars car class.

The 2008 Audi A8 L Automatic (S6) 12-cyl, 6.0 L runs on premium gasoline and is in the Large Cars car class.

🛣 How Many Miles per Gallon (MPG) Does a 2008 Audi A8 L Get?

Across all models, the combined average MPG for the 2008 Audi A8 L is 17 miles per gallon.

The table below breaks down the MPG for each model option:

Model OptionCombined MPGCity MPGHighway MPG
Automatic (S6) 8-cyl, 4.2 L181623
Automatic (S6) 12-cyl, 6.0 L151319

💵 What is the Average Yearly Fuel Cost for a 2008 Audi A8 L?

The average fuel costs for all models of the 2008 Audi A8 L is $4,525.

The average fuel costs have 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.

Comparing a 2008 Audi A8 L to an average vehicle over 5 years, you will spend $11,125 more on fuel.

The table below shows the fuel costs and 5-year save/spend for each model option:

Model OptionFuel Cost5-Year Save/Spend
Automatic (S6) 8-cyl, 4.2 L$4,100spend $9,000 more
Automatic (S6) 12-cyl, 6.0 L$4,950spend $13,250 more

The 2008 Audi A8 L is also subject to the Gas Guzzler Tax, which is a federal tax on vehicles that has a combined MPG of less than 22.5.

The tables below show how much you can expect to pay in Gas Guzzler taxes.

Model OptionGas Guzzler Tax
Automatic (S6) 12-cyl, 6.0 L$4,500

🛢 How Many Barrels of Petroleum Does a 2008 Audi A8 L Consume?

Across all models, the average number barrels of petroleum that the 2008 Audi A8 L will consume in one year is 19 barrels.

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

Model OptionBarrels
Automatic (S6) 8-cyl, 4.2 L17
Automatic (S6) 12-cyl, 6.0 L20

💨 How Many Grams of CO2 Does a 2008 Audi A8 L Emit?

The 2008 Audi A8 L will emit an average of about -15,000 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 1 tree would be needed to offset emissions from the 2008 Audi A8 L.

Overview

The tables below cover all of the miles per gallon, engine specifications, and emission details we have for the 2 2008 Audi A8 L model options.

Automatic (S6) 8-cyl, 4.2 L

The table below contains all of the details we have for the 2008 Audi A8 L Automatic (S6) 8-cyl, 4.2 L:

City MPG16
Highway MPG23
Combined MPG18
Save/Spend vs Average CarSpend $9,000
Fuel Cost$4,100
Fuel Type 1Premium
Barrels of Petroleum17
Grams of CO2-15,000
Trees Needed to Offset-1
Drive4-Wheel or All-Wheel Drive
Cylinders8
Displacement4.2
TransmissionAutomatic (S6)
Vehicle ClassLarge Cars
Start/Stop?No
Supercharged?No
Turbocharged?No

Automatic (S6) 12-cyl, 6.0 L

The table below contains all of the details we have for the 2008 Audi A8 L Automatic (S6) 12-cyl, 6.0 L:

City MPG13
Highway MPG19
Combined MPG15
Save/Spend vs Average CarSpend $13,250
Gas Guzzler Tax$4,500
Fuel Cost$4,950
Fuel Type 1Premium
Barrels of Petroleum20
Grams of CO2-15,000
Trees Needed to Offset-1
Drive4-Wheel or All-Wheel Drive
Cylinders12
Displacement6
TransmissionAutomatic (S6)
Vehicle ClassLarge Cars
Start/Stop?No
Supercharged?No
Turbocharged?No

Link To or Reference This Page

If you use this page in your research, please reference MPG Buddy as the source.

  • "2008 Audi A8 L MPG and Fuel Economy." MPG Buddy. Accessed on January 3, 2026. https://mpgbuddy.com/cars/audi/a8-l/2008.

  • "2008 Audi A8 L MPG and Fuel Economy." MPG Buddy, https://mpgbuddy.com/cars/audi/a8-l/2008. Accessed January 3, 2026.

  • 2008 Audi A8 L MPG and Fuel Economy. MPG Buddy. Retrieved from https://mpgbuddy.com/cars/audi/a8-l/2008.