2015 head-to-head · Midsize & Large SUV

2015 Ford Flex vs GMC Acadia

MPG, range and what each one really costs you to fuel, from official EPA ratings and recalculated with your own gas and electricity prices.

Swap sides
✓ Cheaper to run
$2,325/ year to fuel
20 MPG
✓ Cheaper to run
$2,447/ year to fuel
19 MPG

The 2015 Ford Flex is the cheaper one to run. Driving 15,000 miles a year with $3.10/gal regular gas, it costs about $2,325 a year to fuel (20 MPG), versus $2,447 for the 2015 GMC Acadia (19 MPG). That's roughly $122 a year, or about $612 over five years.

Your numbers

Change these to match your driving and local prices. Every figure and chart on this page updates.

Fuel cost over 10 years

  • Ford Flex
  • GMC Acadia

Side by side

Ford FlexGMC Acadia
$2,325 Your annual fuel cost $2,447
20 MPG Combined efficiency 19 MPG
18 MPG City 17 MPG
25 MPG Highway 24 MPG
438 g/mi Tailpipe CO₂ (g/mi) 465 g/mi
5/10 EPA fuel economy score 4/10
5/10 EPA greenhouse gas score 4/10
Gas Powertrain Gas
Regular gasoline Fuel Regular gasoline
3.5L 6-cyl Engine / motor 3.6L 6-cyl
6-speed automatic Transmission 6-speed automatic
FWD Drivetrain FWD

✓ marks the better value. EPA scores run 1–10 (10 is best). Volumes come from the EPA interior volume index and aren't published for every body style.

Ford Flex vs GMC Acadia across model years

  • Ford Flex
  • GMC Acadia

Annual fuel cost of the most efficient configuration of each model year, at your prices. Click a point to open that year.

How they differ

Among 45 2015 midsize & large SUVs, the Ford Flex ranks 11th and the GMC Acadia 18th for lowest fuel cost.

Frequently asked questions

Which is more fuel-efficient, the 2015 Ford Flex or the 2015 GMC Acadia?

Measured by cost to drive, the Ford Flex. The Ford Flex is rated 20 MPG combined and the GMC Acadia 19 MPG (EPA, most efficient configuration of each).

How much does it cost to fuel the 2015 Ford Flex vs. the GMC Acadia per year?

At 15,000 miles a year with $3.10/gal regular gas, about $2,325 for the Ford Flex and $2,447 for the GMC Acadia.

Ford Flex vs GMC Acadia in other years

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