2008 Pontiac Grand Prix 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 Pontiac Grand Prix.

The 2008 Pontiac Grand Prix has 2 model options: Automatic 4-spd 6-cyl, 3.8 L and Automatic (S4) 8-cyl, 5.3 L.

The 2008 Pontiac Grand Prix Automatic 4-spd 6-cyl, 3.8 L runs on regular gasoline and is in the Midsize Cars car class.

The 2008 Pontiac Grand Prix Automatic (S4) 8-cyl, 5.3 L runs on premium gasoline and is in the Midsize Cars car class.

🛣 How Many Miles per Gallon (MPG) Does a 2008 Pontiac Grand Prix Get?

Across all models, the combined average MPG for the 2008 Pontiac Grand Prix is 20 miles per gallon.

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

Model OptionCombined MPGCity MPGHighway MPG
Automatic 4-spd 6-cyl, 3.8 L211828
Automatic (S4) 8-cyl, 5.3 L191625

💵 What is the Average Yearly Fuel Cost for a 2008 Pontiac Grand Prix?

The average fuel costs for all models of the 2008 Pontiac Grand Prix is $3,450.

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 Pontiac Grand Prix to an average vehicle over 5 years, you will spend $5,750 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 4-spd 6-cyl, 3.8 L$3,000spend $3,500 more
Automatic (S4) 8-cyl, 5.3 L$3,900spend $8,000 more

🛢 How Many Barrels of Petroleum Does a 2008 Pontiac Grand Prix Consume?

Across all models, the average number barrels of petroleum that the 2008 Pontiac Grand Prix will consume in one year is 15 barrels.

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

Model OptionBarrels
Automatic 4-spd 6-cyl, 3.8 L14
Automatic (S4) 8-cyl, 5.3 L16

💨 How Many Grams of CO2 Does a 2008 Pontiac Grand Prix Emit?

The 2008 Pontiac Grand Prix 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 Pontiac Grand Prix.

Overview

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

Automatic 4-spd 6-cyl, 3.8 L

The table below contains all of the details we have for the 2008 Pontiac Grand Prix Automatic 4-spd 6-cyl, 3.8 L:

City MPG18
Highway MPG28
Combined MPG21
Save/Spend vs Average CarSpend $3,500
Fuel Cost$3,000
Fuel Type 1Regular
Barrels of Petroleum14
Grams of CO2-15,000
Trees Needed to Offset-1
DriveFront-Wheel Drive
Cylinders6
Displacement3.8
TransmissionAutomatic 4-spd
Vehicle ClassMidsize Cars
Start/Stop?No
Supercharged?No
Turbocharged?No

Automatic (S4) 8-cyl, 5.3 L

The table below contains all of the details we have for the 2008 Pontiac Grand Prix Automatic (S4) 8-cyl, 5.3 L:

City MPG16
Highway MPG25
Combined MPG19
Save/Spend vs Average CarSpend $8,000
Fuel Cost$3,900
Fuel Type 1Premium
Barrels of Petroleum16
Grams of CO2-15,000
Trees Needed to Offset-1
DriveFront-Wheel Drive
Cylinders8
Displacement5.3
TransmissionAutomatic (S4)
Vehicle ClassMidsize 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 Pontiac Grand Prix MPG and Fuel Economy." MPG Buddy. Accessed on January 3, 2026. https://mpgbuddy.com/cars/pontiac/grand-prix/2008.

  • "2008 Pontiac Grand Prix MPG and Fuel Economy." MPG Buddy, https://mpgbuddy.com/cars/pontiac/grand-prix/2008. Accessed January 3, 2026.

  • 2008 Pontiac Grand Prix MPG and Fuel Economy. MPG Buddy. Retrieved from https://mpgbuddy.com/cars/pontiac/grand-prix/2008.