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2004 Cadillac DeVille
Shown: 2004 Cadillac DeVille. Photo: MercurySable99, CC BY-SA 4.0, via Wikimedia Commons
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  • MY2004–2005

Cadillac Armored Deville MPG & Fuel Cost by Year

2 model years · 2004–2005

15 MPG
Combined
13 MPG
City
18 MPG
Highway
Annual cost · MY2005 Armored Deville 4.6L 8-cyl FWD
$4,360

15,000 mi/yr · regular gasoline $4.36/gal (U.S. average, Sep 2026)

All Cadillac models

Cadillac Armored Deville fuel economy at a glance

EPA has rated the Cadillac Armored Deville for 2 model years, 2004 to 2005. Across those years its combined rating runs 15 MPG. The latest model year, 2005, has 1 configuration rated 15 MPG combined and costing $4,360 a year to fuel at regular gasoline $4.36/gal (U.S. average, Sep 2026). The most efficient configuration on record since 2004 is the 2005 Armored Deville 4.6L 8-cyl FWD, at 15 MPG.

Cadillac Armored Deville MPG by year

1416 20042005 Gas 1416 20042005 Gas
Combined MPG: the line is the most efficient configuration, the shaded band reaches down to the least efficient. Dotted lines mark new generations.
Cadillac Armored Deville: combined fuel economy and annual fuel cost for each model year, grouped by generation
Year Gas (MPG) $/yr
2004-2005 Generation page
2005 15 $4,360
2004 15 $4,360

Costs use the current EIA price set and 15,000 miles a year for every year, so years are comparable. Green marks the best year for each powertrain.

Cadillac Armored Deville generations

1 generations between 2004 and 2005. Open one for the table of every model year and configuration.

2005 powertrain options

Gas · 4.6L
Combined
15 MPG
Per year
$4,360
See gas configurations
EPA ratings: fueleconomy.gov file of Sep 29, 2026 · regular gasoline $4.36/gal (U.S. average, Sep 2026) · 15,000 mi/yr, 55% city / 45% highway · How we calculate

Frequently asked questions

What is the Cadillac Armored Deville's gas mileage by year?

EPA combined ratings for the Cadillac Armored Deville run 15 MPG across model years 2004 to 2005. The latest year, 2005, is rated 15 MPG.

Which Cadillac Armored Deville model year has the best gas mileage?

The 2005 Cadillac Armored Deville Armored Deville 4.6L 8-cyl FWD has the highest combined rating since 2004, at 15 MPG.

How much does a Cadillac Armored Deville cost to fuel per year?

For MY2005, EPA-rated configurations cost $4,360 a year to fuel, driving 15,000 miles at regular gasoline $4.36/gal (U.S. average, Sep 2026). The most efficient one costs $4,360.

Has the Cadillac Armored Deville's fuel economy improved over time?

Not much. The most efficient configuration is rated 15 MPG in both 2004 and 2005.

Which Cadillac Armored Deville model years have the same ratings?

EPA lists identical ratings as the previous year for 2005. The generation pages mark those years "same EPA ratings" and point to the year that holds the full table.