1984 Oldsmobile Firenza MPG and Fuel Economy
On this page, you will find a complete guide to the miles per gallon and fuel efficiency data for the 1984 Oldsmobile Firenza.
The 1984 Oldsmobile Firenza has 10 model options: Automatic 3-spd 4-cyl, 1.8 L, Manual 5-spd 4-cyl, 1.8 L, Automatic 3-spd 4-cyl, 2.0 L, Manual 4-spd 4-cyl, 2.0 L, Manual 5-spd 4-cyl, 2.0 L, Automatic 3-spd 4-cyl, 1.8 L, Manual 5-spd 4-cyl, 1.8 L, Automatic 3-spd 4-cyl, 2.0 L, Manual 4-spd 4-cyl, 2.0 L and Manual 5-spd 4-cyl, 2.0 L.
The 1984 Oldsmobile Firenza Automatic 3-spd 4-cyl, 1.8 L runs on regular gasoline and is in the Compact Cars car class.
The 1984 Oldsmobile Firenza Manual 5-spd 4-cyl, 1.8 L runs on regular gasoline and is in the Compact Cars car class.
The 1984 Oldsmobile Firenza Automatic 3-spd 4-cyl, 2.0 L runs on regular gasoline and is in the Compact Cars car class.
The 1984 Oldsmobile Firenza Manual 4-spd 4-cyl, 2.0 L runs on regular gasoline and is in the Compact Cars car class.
The 1984 Oldsmobile Firenza Manual 5-spd 4-cyl, 2.0 L runs on regular gasoline and is in the Compact Cars car class.
The 1984 Oldsmobile Firenza Automatic 3-spd 4-cyl, 1.8 L runs on regular gasoline and is in the Compact Cars car class.
The 1984 Oldsmobile Firenza Manual 5-spd 4-cyl, 1.8 L runs on regular gasoline and is in the Compact Cars car class.
The 1984 Oldsmobile Firenza Automatic 3-spd 4-cyl, 2.0 L runs on regular gasoline and is in the Compact Cars car class.
The 1984 Oldsmobile Firenza Manual 4-spd 4-cyl, 2.0 L runs on regular gasoline and is in the Compact Cars car class.
The 1984 Oldsmobile Firenza Manual 5-spd 4-cyl, 2.0 L runs on regular gasoline and is in the Compact Cars car class.
🛣 How Many Miles per Gallon (MPG) Does a 1984 Oldsmobile Firenza Get?
Across all models, the combined average MPG for the 1984 Oldsmobile Firenza is 25 miles per gallon.
The table below breaks down the MPG for each model option:
| Model Option | Combined MPG | City MPG | Highway MPG |
|---|---|---|---|
| Automatic 3-spd 4-cyl, 1.8 L | 24 | 21 | 29 |
| Manual 5-spd 4-cyl, 1.8 L | 26 | 23 | 33 |
| Automatic 3-spd 4-cyl, 2.0 L | 25 | 22 | 29 |
| Manual 4-spd 4-cyl, 2.0 L | 25 | 22 | 29 |
| Manual 5-spd 4-cyl, 2.0 L | 25 | 21 | 31 |
| Automatic 3-spd 4-cyl, 1.8 L | 24 | 21 | 29 |
| Manual 5-spd 4-cyl, 1.8 L | 26 | 23 | 32 |
| Automatic 3-spd 4-cyl, 2.0 L | 22 | 19 | 26 |
| Manual 4-spd 4-cyl, 2.0 L | 24 | 21 | 30 |
| Manual 5-spd 4-cyl, 2.0 L | 25 | 21 | 31 |
💵 What is the Average Yearly Fuel Cost for a 1984 Oldsmobile Firenza?
The average fuel costs for all models of the 1984 Oldsmobile Firenza is $2,545.
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 1984 Oldsmobile Firenza to an average vehicle over 5 years, you will spend $1,225 more on fuel.
The table below shows the fuel costs and 5-year save/spend for each model option:
| Model Option | Fuel Cost | 5-Year Save/Spend |
|---|---|---|
| Automatic 3-spd 4-cyl, 1.8 L | $2,600 | spend $1,500 more |
| Manual 5-spd 4-cyl, 1.8 L | $2,400 | spend $500 more |
| Automatic 3-spd 4-cyl, 2.0 L | $2,500 | spend $1,000 more |
| Manual 4-spd 4-cyl, 2.0 L | $2,500 | spend $1,000 more |
| Manual 5-spd 4-cyl, 2.0 L | $2,500 | spend $1,000 more |
| Automatic 3-spd 4-cyl, 1.8 L | $2,600 | spend $1,500 more |
| Manual 5-spd 4-cyl, 1.8 L | $2,400 | spend $500 more |
| Automatic 3-spd 4-cyl, 2.0 L | $2,850 | spend $2,750 more |
| Manual 4-spd 4-cyl, 2.0 L | $2,600 | spend $1,500 more |
| Manual 5-spd 4-cyl, 2.0 L | $2,500 | spend $1,000 more |
🛢 How Many Barrels of Petroleum Does a 1984 Oldsmobile Firenza Consume?
Across all models, the average number barrels of petroleum that the 1984 Oldsmobile Firenza will consume in one year is 12 barrels.
The majority of the world's petroleum is sourced from countries like Saudi Arabia, Russia, Iraq, and the United States.
| Model Option | Barrels |
|---|---|
| Automatic 3-spd 4-cyl, 1.8 L | 12 |
| Manual 5-spd 4-cyl, 1.8 L | 11 |
| Automatic 3-spd 4-cyl, 2.0 L | 12 |
| Manual 4-spd 4-cyl, 2.0 L | 12 |
| Manual 5-spd 4-cyl, 2.0 L | 12 |
| Automatic 3-spd 4-cyl, 1.8 L | 12 |
| Manual 5-spd 4-cyl, 1.8 L | 11 |
| Automatic 3-spd 4-cyl, 2.0 L | 14 |
| Manual 4-spd 4-cyl, 2.0 L | 12 |
| Manual 5-spd 4-cyl, 2.0 L | 12 |
💨 How Many Grams of CO2 Does a 1984 Oldsmobile Firenza Emit?
The 1984 Oldsmobile Firenza 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 1984 Oldsmobile Firenza.
Overview
The tables below cover all of the miles per gallon, engine specifications, and emission details we have for the 10 1984 Oldsmobile Firenza model options.
Automatic 3-spd 4-cyl, 1.8 L
The table below contains all of the details we have for the 1984 Oldsmobile Firenza Automatic 3-spd 4-cyl, 1.8 L:
| City MPG | 21 |
|---|---|
| Highway MPG | 29 |
| Combined MPG | 24 |
| Save/Spend vs Average Car | Spend $1,500 |
| Fuel Cost | $2,600 |
| Fuel Type 1 | Regular |
| Barrels of Petroleum | 12 |
| Grams of CO2 | -15,000 |
| Trees Needed to Offset | -1 |
| Cylinders | 4 |
| Displacement | 1.8 |
| Transmission | Automatic 3-spd |
| Vehicle Class | Compact Cars |
| Start/Stop? | No |
| Supercharged? | No |
| Turbocharged? | No |
Manual 5-spd 4-cyl, 1.8 L
The table below contains all of the details we have for the 1984 Oldsmobile Firenza Manual 5-spd 4-cyl, 1.8 L:
| City MPG | 23 |
|---|---|
| Highway MPG | 33 |
| Combined MPG | 26 |
| Save/Spend vs Average Car | Spend $500 |
| Fuel Cost | $2,400 |
| Fuel Type 1 | Regular |
| Barrels of Petroleum | 11 |
| Grams of CO2 | -15,000 |
| Trees Needed to Offset | -1 |
| Cylinders | 4 |
| Displacement | 1.8 |
| Transmission | Manual 5-spd |
| Vehicle Class | Compact Cars |
| Start/Stop? | No |
| Supercharged? | No |
| Turbocharged? | No |
Automatic 3-spd 4-cyl, 2.0 L
The table below contains all of the details we have for the 1984 Oldsmobile Firenza Automatic 3-spd 4-cyl, 2.0 L:
| City MPG | 22 |
|---|---|
| Highway MPG | 29 |
| Combined MPG | 25 |
| Save/Spend vs Average Car | Spend $1,000 |
| Fuel Cost | $2,500 |
| Fuel Type 1 | Regular |
| Barrels of Petroleum | 12 |
| Grams of CO2 | -15,000 |
| Trees Needed to Offset | -1 |
| Cylinders | 4 |
| Displacement | 2 |
| Transmission | Automatic 3-spd |
| Vehicle Class | Compact Cars |
| Start/Stop? | No |
| Supercharged? | No |
| Turbocharged? | No |
Manual 4-spd 4-cyl, 2.0 L
The table below contains all of the details we have for the 1984 Oldsmobile Firenza Manual 4-spd 4-cyl, 2.0 L:
| City MPG | 22 |
|---|---|
| Highway MPG | 29 |
| Combined MPG | 25 |
| Save/Spend vs Average Car | Spend $1,000 |
| Fuel Cost | $2,500 |
| Fuel Type 1 | Regular |
| Barrels of Petroleum | 12 |
| Grams of CO2 | -15,000 |
| Trees Needed to Offset | -1 |
| Cylinders | 4 |
| Displacement | 2 |
| Transmission | Manual 4-spd |
| Vehicle Class | Compact Cars |
| Start/Stop? | No |
| Supercharged? | No |
| Turbocharged? | No |
Manual 5-spd 4-cyl, 2.0 L
The table below contains all of the details we have for the 1984 Oldsmobile Firenza Manual 5-spd 4-cyl, 2.0 L:
| City MPG | 21 |
|---|---|
| Highway MPG | 31 |
| Combined MPG | 25 |
| Save/Spend vs Average Car | Spend $1,000 |
| Fuel Cost | $2,500 |
| Fuel Type 1 | Regular |
| Barrels of Petroleum | 12 |
| Grams of CO2 | -15,000 |
| Trees Needed to Offset | -1 |
| Cylinders | 4 |
| Displacement | 2 |
| Transmission | Manual 5-spd |
| Vehicle Class | Compact Cars |
| Start/Stop? | No |
| Supercharged? | No |
| Turbocharged? | No |
Automatic 3-spd 4-cyl, 1.8 L
The table below contains all of the details we have for the 1984 Oldsmobile Firenza Automatic 3-spd 4-cyl, 1.8 L:
| City MPG | 21 |
|---|---|
| Highway MPG | 29 |
| Combined MPG | 24 |
| Save/Spend vs Average Car | Spend $1,500 |
| Fuel Cost | $2,600 |
| Fuel Type 1 | Regular |
| Barrels of Petroleum | 12 |
| Grams of CO2 | -15,000 |
| Trees Needed to Offset | -1 |
| Cylinders | 4 |
| Displacement | 1.8 |
| Transmission | Automatic 3-spd |
| Vehicle Class | Compact Cars |
| Start/Stop? | No |
| Supercharged? | No |
| Turbocharged? | No |
Manual 5-spd 4-cyl, 1.8 L
The table below contains all of the details we have for the 1984 Oldsmobile Firenza Manual 5-spd 4-cyl, 1.8 L:
| City MPG | 23 |
|---|---|
| Highway MPG | 32 |
| Combined MPG | 26 |
| Save/Spend vs Average Car | Spend $500 |
| Fuel Cost | $2,400 |
| Fuel Type 1 | Regular |
| Barrels of Petroleum | 11 |
| Grams of CO2 | -15,000 |
| Trees Needed to Offset | -1 |
| Cylinders | 4 |
| Displacement | 1.8 |
| Transmission | Manual 5-spd |
| Vehicle Class | Compact Cars |
| Start/Stop? | No |
| Supercharged? | No |
| Turbocharged? | No |
Automatic 3-spd 4-cyl, 2.0 L
The table below contains all of the details we have for the 1984 Oldsmobile Firenza Automatic 3-spd 4-cyl, 2.0 L:
| City MPG | 19 |
|---|---|
| Highway MPG | 26 |
| 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 | -15,000 |
| Trees Needed to Offset | -1 |
| Cylinders | 4 |
| Displacement | 2 |
| Transmission | Automatic 3-spd |
| Vehicle Class | Compact Cars |
| Start/Stop? | No |
| Supercharged? | No |
| Turbocharged? | No |
Manual 4-spd 4-cyl, 2.0 L
The table below contains all of the details we have for the 1984 Oldsmobile Firenza Manual 4-spd 4-cyl, 2.0 L:
| City MPG | 21 |
|---|---|
| Highway MPG | 30 |
| Combined MPG | 24 |
| Save/Spend vs Average Car | Spend $1,500 |
| Fuel Cost | $2,600 |
| Fuel Type 1 | Regular |
| Barrels of Petroleum | 12 |
| Grams of CO2 | -15,000 |
| Trees Needed to Offset | -1 |
| Cylinders | 4 |
| Displacement | 2 |
| Transmission | Manual 4-spd |
| Vehicle Class | Compact Cars |
| Start/Stop? | No |
| Supercharged? | No |
| Turbocharged? | No |
Manual 5-spd 4-cyl, 2.0 L
The table below contains all of the details we have for the 1984 Oldsmobile Firenza Manual 5-spd 4-cyl, 2.0 L:
| City MPG | 21 |
|---|---|
| Highway MPG | 31 |
| Combined MPG | 25 |
| Save/Spend vs Average Car | Spend $1,000 |
| Fuel Cost | $2,500 |
| Fuel Type 1 | Regular |
| Barrels of Petroleum | 12 |
| Grams of CO2 | -15,000 |
| Trees Needed to Offset | -1 |
| Cylinders | 4 |
| Displacement | 2 |
| Transmission | Manual 5-spd |
| Vehicle Class | Compact Cars |
| Start/Stop? | No |
| Supercharged? | No |
| Turbocharged? | No |
Link To or Reference This Page
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<a href="https://mpgbuddy.com/cars/oldsmobile/firenza/1984">1984 Oldsmobile Firenza MPG and Fuel Economy</a>
"1984 Oldsmobile Firenza MPG and Fuel Economy." MPG Buddy. Accessed on January 3, 2026. https://mpgbuddy.com/cars/oldsmobile/firenza/1984.
"1984 Oldsmobile Firenza MPG and Fuel Economy." MPG Buddy, https://mpgbuddy.com/cars/oldsmobile/firenza/1984. Accessed January 3, 2026.
1984 Oldsmobile Firenza MPG and Fuel Economy. MPG Buddy. Retrieved from https://mpgbuddy.com/cars/oldsmobile/firenza/1984.