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2004 Chevrolet Express Cargo (dedicated CNG) vs 2004 Chevrolet Impala Police

EPA figure2004 Chevrolet Express Cargo (dedicated CNG)2004 Chevrolet Impala Police
Model year20042004
Body · driveVan · Rear-Wheel Drive · Natural gasLarge · Front-Wheel Drive · Gas
Combined MPG1220
City / highway MPG11 / 1517 / 26
Fuel a year$3,850$3,350
Tailpipe CO₂ (g/mi)586444
Engine6.0 L 8-cyl3.8 L 6-cyl
TransmissionAutomatic 4-spdAutomatic 4-spd

▲ marks the better official figure on that line: more range, MPG or MPGe; less fuel cost or CO₂. From fueleconomy.gov.