1998 Mercury Grand Marquis MPG and Fuel Economy

On this page, you will find a complete guide to the miles per gallon and fuel efficiency data for the 1998 Mercury Grand Marquis.

The 1998 Mercury Grand Marquis 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 1998 Mercury Grand Marquis is, we have the information you need.

🛣 How Many Miles per Gallon (MPG) Does a 1998 Mercury Grand Marquis Get?

First off, the most commonly asked question. A 1998 Mercury Grand Marquis gets up to 15 miles per gallon in the city, and 22 miles per gallon on the highway.

The combined average MPG for the 1998 Mercury Grand Marquis is 18 miles per gallon.

💵 What is the Average Yearly Fuel Cost for a 1998 Mercury Grand Marquis?

The estimated fuel costs for the 1998 Mercury Grand Marquis is $3,500 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 1998 Mercury Grand Marquis to an average vehicle over 5 years, you will spend $6,000 more on fuel.

🛢 How Many Barrels of Petroleum Does a 1998 Mercury Grand Marquis Consume?

The 1998 Mercury Grand Marquis will consume roughly 17 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.

Overview

The table below covers all of the miles per gallon, engine specifications, and emission details we have for the 1998 Mercury Grand Marquis.

City MPG15
Highway MPG22
Combined MPG18
Save/Spend vs Average CarSpend $6,000
Fuel Cost$3,500
Fuel Type 1Regular
Barrels of Petroleum17
DriveRear-Wheel Drive
Cylinders8
Displacement4.6
TransmissionAutomatic 4-spd
Vehicle ClassLarge Cars
Start/Stop?No
Supercharged?No
Turbocharged?No

Related Mercury Models from 1998

If you're interested in other Mercury models from 1998, 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.

Link To or Reference This Page

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

  • "1998 Mercury Grand Marquis MPG and Fuel Economy." MPG Buddy. Accessed on January 3, 2026. https://mpgbuddy.com/cars/mercury/grand-marquis/1998.

  • "1998 Mercury Grand Marquis MPG and Fuel Economy." MPG Buddy, https://mpgbuddy.com/cars/mercury/grand-marquis/1998. Accessed January 3, 2026.

  • 1998 Mercury Grand Marquis MPG and Fuel Economy. MPG Buddy. Retrieved from https://mpgbuddy.com/cars/mercury/grand-marquis/1998.