MPGTerminal
34/100
1998Large CarsRegular

1998 Cadillac DeVille

EPA ID: 14381
15
City MPG
18
Combined MPG
18MPG· Below Avg
24
Highway MPG

Fuel Economy Overview

The 1998 Cadillac DeVille achieves an EPA-estimated 18 MPG in combined city and highway driving, with 15 MPG in the city and 24 MPG on the highway. Powered by a 4.6L 8-cylinder engine paired with a automatic 4-spd, this large cars features Front-Wheel Drive drive.

In terms of environmental impact, the 1998 DeVille produces approximately 494 grams of CO2 per mile. This figure is measured under standardized EPA test conditions and represents tailpipe emissions only. For context, the average new vehicle sold in the United States produces approximately 400 grams of CO2 per mile, meaning this DeVille has higher-than-average emissions in this regard.

The estimated annual fuel cost for this vehicle is $3,300, based on 15,000 miles of driving per year and current national average fuel prices. Compared to the average new vehicle, you would save $5,750 over a 5-year period. This calculation accounts for differences in fuel consumption efficiency and provides a practical measure of long-term ownership costs attributable to fuel economy.

Energy DNA

Vehicle ClassLarge Cars
Fuel TypeRegular
Engine4.6L 8-cyl
AspirationNaturally Aspirated
TransmissionAutomatic 4-spd
Drive TypeFront-Wheel Drive

Green Scorecard

CO2 Emissions494 g/mi
Start-Stop SystemNot Equipped
GHG Score-1/10
Smog RatingN/A
Est. Annual Cost$3,300
5-Year Cost DeltaSave $5,750

Personalized Commute CalculatorEPA defaults to 55% City / 45% Hwy

55% City45% Highway

Adjust the slider to match your daily driving habits. City driving involves stop-and-go traffic under 45mph, while highway driving represents sustained speeds over 55mph.

Your Real MPG
18.0
Impact vs EPA
$-7
/ year
💨

Aerodynamic Speed Penalty

EPA highway tests average roughly 48 mph. Driving at 75 mph increases aerodynamic drag exponentially. Expect your real-world highway fuel economy to drop by roughly 15-20% at interstate speeds.

5-Year Total Cost of Ownership

Estimated Monthly Cost
$930/mo
Includes estimated depreciation, fuel, insurance, and state fees over 5 years. Does not include loan interest.
15,000 mi
Value Depreciation
Est. value lost over 60 months
$28,000
50.2%
Fuel & Electricity
Based on National Average rates ($3.50/gal)
$14,583
26.1%
Estimated Insurance
Based on vehicle class risk profile
$12,800
22.9%
State Registration Fees
Based on National Average DMV base rates
$400
0.7%
Total 5-Year Cost$55,783

Recall Intelligence

Campaign #00V217000·2001-06-01
moderate
Component: AIR BAGS:SIDE/WINDOW

VEHICLE DESCRIPTION: PASSENGER VEHICLES. SOME OF THE SIDE IMPACT SENSOR MODULES HAVE QUALITY PROBLEMS THAT CAN CAUSE AN INADVERTENT DEPLOYMENT OF THE DRIVER OR PASSENGER SIDE IMPACT AIR BAGS. THESE SIDE AIR BAGS DEPLOY WITH LESS FORCE THAN A FRONTAL AIR BAG AND ARE DESIGNED TO MINIMIZE THE RISK OF SERIOUS INJURY.

Consequence & Remedy

Consequence: HOWEVER, AN OCCUPANT CAN RECEIVE SOME INJURY FROM A DEPLOYMENT.

Remedy: DEALERS WILL REPLACE THE DRIVER AND PASSENGER SIDE IMPACT SENSING MODULES. IF THE VEHICLE HAS HAD THE SIDE AIR BAGS TEMPORARILY DISCONECTED, THE TEMPORARY DISCONNECT WILL BE REMOVED BEFORE REPLACING THE SIDE IMPACT SENSING MODULES.

Campaign #97V232000·1998-01-01
critical
Component: STRUCTURE:BODY:HOOD:HINGE AND ATTACHMENTS

VEHICLE DESCRIPTION: PASSENGER VEHICLES. THESE VEHICLES WERE BUILT WITH HOOD HINGE PIVOT BOLTS WHICH CAN BREAK DUE TO AN IMPROPER HEAT TREAT CONDITION. THIS DOES NOT COMPLY WITH THE REQUIREMENTS OF FMVSS NO. 219, "WINDSHIELD ZONE INTRUSION." A BROKEN BOLT CAN CAUSE EITHER THE CORNER OF THE HOOD NEAR THE WINDSHIELD TO RAISE, OR ONE SIDE OF THE HOOD TO BE UNSTABLE WHEN OPENED.

Consequence & Remedy

Consequence: IN THE EVENT OF A VEHICLE CRASH, THE HOOD COULD BE PUSHED BACK THROUGH THE WINDSHIELD GLASS POSSIBLY INJURING THE VEHICLE OCCUPANTS.

Remedy: DEALERS WILL REPLACE THE HOOD HINGE PIVOT BOLTS.

Campaign #97V183000·1997-11-01
advisory
Component: VEHICLE SPEED CONTROL

VEHICLE DESCRIPTION: PASSENGER VEHICLES, HEARSES AND LIMOUSINES. THE CANISTER PURGE EVAPORATIVE EMISSIONS HARNESS ON THESE VEHICLES WAS MISROUTED.

Consequence & Remedy

Consequence: THE HARNESS COULD INTERFERE WITH THE CRUISE CONTROL AND THROTTLE LINKAGE PREVENTING RETURN TO A CLOSED THROTTLE.

Remedy: DEALERS WILL INSPECT THE VEHICLE FOR PROPER ROUTING OF THE HARNESS, CORRECT AS NECESSARY, AND INSTALL A PLASTIC TIE STRAP TO THE HARNESS.

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Looking for comprehensive historical data?

NHTSA FARS (Fatal Crash History) and broader generational safety trends are aggregated at the model level rather than by specific engine configurations. View the complete historical data profile for all Cadillac DeVille configurations.

View Model History

Similar 1998 Large Cars Alternatives

1998 BMW 740il

4.4L 8-cyl Rear-Wheel Drive

18MPG
City: 15Hwy: 22$3,300/yr

1998 Ford Crown Victoria

4.6L 8-cyl Rear-Wheel Drive

18MPG
City: 15Hwy: 22$3,300/yr

1998 Lincoln Continental

4.6L 8-cyl Front-Wheel Drive

18MPG
City: 15Hwy: 22$3,850/yr

1998 Lincoln Town Car

4.6L 8-cyl Rear-Wheel Drive

18MPG
City: 15Hwy: 22$3,300/yr

1998 Mercedes-Benz S320

3.2L 6-cyl Rear-Wheel Drive

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City: 15Hwy: 22$3,850/yr

1998 Mercedes-Benz S320

5L 6-cyl Rear-Wheel Drive

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City: 15Hwy: 22$3,850/yr

Fuel Cost Analysis

Annual Fuel Cost$3,300
vs. Avg Vehicle (5 yrs)Save $5,750

Based on 15,000 miles/year and current fuel prices.

Efficiency Breakdown

City15 MPG
Highway24 MPG
Combined18 MPG

Estimated Lifetime Carbon Footprint

(Based on 200,000 miles driven)

98.7 metric tons CO₂
Equivalent To:
🌳 122 tree seedlings grown for 10 yrs
✈️ 8.2 cross-country flights/yr

Data Provenance

Data directly from the EPA National Vehicle and Fuel Emissions Laboratory. The combined rating is a weighted average (55% city, 45% highway). For official figures, visit fueleconomy.gov.