Isuzu Ascender MPG by Year & Engine (EPA)

EPA fuel-economy ratings for every rated Isuzu Ascender model year from 2003 to 2009 — each engine and transmission with its official city, highway and combined figures. Over these years the Ascender has been offered with 4.2L 6-cyl, 5.3L 8-cyl engines; every rated year lands at 16 MPG combined. All rated gas versions run on regular gasoline. Data: U.S. Department of Energy & EPA, fueleconomy.gov; prices are live medians from VehiSales listings.

Isuzu Ascender fuel economy by year

YearCombinedEnginesMedian used priceFor sale
2009 16 MPG 4.2L 6-cyl
2008 16 MPG 4.2L 6-cyl
2007 16 MPG 5.3L 8-cyl, 4.2L 6-cyl
2006 15–16 MPG 4.2L 6-cyl, 5.3L 8-cyl
2005 15–16 MPG 4.2L 6-cyl, 5.3L 8-cyl
2004 14–16 MPG 4.2L 6-cyl, 5.3L 8-cyl
2003 14–16 MPG 4.2L 6-cyl, 5.3L 8-cyl

2009 Isuzu Ascender: engines & MPG

The 2009 Ascender was EPA-rated in 1 version (4.2L 6-cyl), with combined economy of 16 MPG.

VersionEngineTransmissionFuelCityHwyCombined
Ascender 5-passenger 4WD 4.2L 6-cyl Automatic 4-spd Regular 14 20 16 MPG

2008 Isuzu Ascender: engines & MPG

The 2008 Ascender was EPA-rated in 2 versions (4.2L 6-cyl), with combined economy of 16 MPG.

VersionEngineTransmissionFuelCityHwyCombined
Ascender 5-passenger 4WD 4.2L 6-cyl Automatic 4-spd Regular 14 20 16 MPG
Ascender 5-passenger 2WD 4.2L 6-cyl Automatic 4-spd Regular 14 20 16 MPG

2007 Isuzu Ascender: engines & MPG

The 2007 Ascender was EPA-rated in 3 versions (5.3L 8-cyl, 4.2L 6-cyl), with combined economy of 16 MPG.

VersionEngineTransmissionFuelCityHwyCombined
Ascender 7-passenger 4WD 5.3L 8-cyl Automatic 4-spd Regular 14 19 16 MPG
Ascender 5-passenger 4WD 4.2L 6-cyl Automatic 4-spd Regular 14 20 16 MPG
Ascender 5-passenger 2WD 4.2L 6-cyl Automatic 4-spd Regular 14 20 16 MPG

2006 Isuzu Ascender: engines & MPG

The 2006 Ascender was EPA-rated in 6 versions (4.2L 6-cyl, 5.3L 8-cyl), with combined economy from 15 to 16 MPG.

VersionEngineTransmissionFuelCityHwyCombined
Ascender 5-passenger 4WD 4.2L 6-cyl Automatic 4-spd Regular 14 20 16 MPG
Ascender 5-passenger 2WD 4.2L 6-cyl Automatic 4-spd Regular 14 20 16 MPG
Ascender 7-passenger 4WD 4.2L 6-cyl Automatic 4-spd Regular 14 19 16 MPG
Ascender 7-passenger 2WD 5.3L 8-cyl Automatic 4-spd Regular 14 19 16 MPG
Ascender 7-passenger 2WD 4.2L 6-cyl Automatic 4-spd Regular 14 19 15 MPG
Ascender 7-passenger 4WD 5.3L 8-cyl Automatic 4-spd Regular 13 18 15 MPG

2005 Isuzu Ascender: engines & MPG

The 2005 Ascender was EPA-rated in 6 versions (4.2L 6-cyl, 5.3L 8-cyl), with combined economy from 15 to 16 MPG.

VersionEngineTransmissionFuelCityHwyCombined
Ascender 7-passenger 4WD 4.2L 6-cyl Automatic 4-spd Regular 14 19 16 MPG
Ascender 5-passenger 4WD 4.2L 6-cyl Automatic 4-spd Regular 14 19 16 MPG
Ascender 5-passenger 2WD 4.2L 6-cyl Automatic 4-spd Regular 14 20 16 MPG
Ascender 7-passenger 4WD 5.3L 8-cyl Automatic 4-spd Regular 13 18 15 MPG
Ascender 7-passenger 2WD 5.3L 8-cyl Automatic 4-spd Regular 13 19 15 MPG
Ascender 7-passenger 2WD 4.2L 6-cyl Automatic 4-spd Regular 13 18 15 MPG

2004 Isuzu Ascender: engines & MPG

The 2004 Ascender was EPA-rated in 6 versions (4.2L 6-cyl, 5.3L 8-cyl), with combined economy from 14 to 16 MPG.

VersionEngineTransmissionFuelCityHwyCombined
Ascender 5-passenger 4WD 4.2L 6-cyl Automatic 4-spd Regular 14 19 16 MPG
Ascender 4WD 4.2L 6-cyl Automatic 4-spd Regular 14 19 16 MPG
Ascender 2WD 5.3L 8-cyl Automatic 4-spd Regular 14 18 16 MPG
Ascender 5-passenger 2WD 4.2L 6-cyl Automatic 4-spd Regular 14 19 16 MPG
Ascender 2WD 4.2L 6-cyl Automatic 4-spd Regular 13 18 15 MPG
Ascender 4WD 5.3L 8-cyl Automatic 4-spd Regular 13 17 14 MPG

2003 Isuzu Ascender: engines & MPG

The 2003 Ascender was EPA-rated in 4 versions (4.2L 6-cyl, 5.3L 8-cyl), with combined economy from 14 to 16 MPG.

VersionEngineTransmissionFuelCityHwyCombined
Ascender 2WD 4.2L 6-cyl Automatic 4-spd Regular 14 19 16 MPG
Ascender 4WD 4.2L 6-cyl Automatic 4-spd Regular 13 19 15 MPG
Ascender 2WD 5.3L 8-cyl Automatic 4-spd Regular 14 18 15 MPG
Ascender 4WD 5.3L 8-cyl Automatic 4-spd Regular 13 16 14 MPG

Frequently asked questions

What MPG does an Isuzu Ascender get?

Every rated Ascender year comes in at 16 MPG combined.

What engines does the 2009 Isuzu Ascender have?

The 2009 Ascender was EPA-rated with 4.2L 6-cyl engines — see the 2009 table above for each version's exact city/highway figures.

Does the Isuzu Ascender require premium gas?

No — rated versions run on regular gasoline.

About this data: EPA ratings from the official U.S. DOE/EPA dataset (fueleconomy.gov), as of September 2026; refreshed monthly. Market prices and listing counts are live medians from VehiSales inventory, updated daily. How to cite: “VehiSales Research, Isuzu Ascender EPA Fuel Economy by Model Year” with a link to https://vehisales.com/research/fuel-economy/isuzu/ascender.

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