The 2017 Ford Flex AWD with the 3.5L V6 gets 18 MPG combined and prioritizes space, quirky style, and all-weather capability over fuel efficiency. This isn’t a family hauler designed to sip fuel, it’s a boldly styled, surprisingly versatile wagon that appeals to a specific type of buyer: one who values individuality and practicality and is willing to accept a middling fuel bill.

City and highway performance

The Flex’s EPA ratings break down to 16 MPG in the city and 22 MPG on the highway. The city number is the more glaring of the two, reflecting the engine’s need to work harder in stop-and-go traffic, and the AWD system’s constant drag. The highway figure is more palatable but still lags behind many of its competitors. The 3.5L V6, while adequate, isn’t a powerhouse. It needs a firm foot to get the Flex moving, and that translates directly to increased fuel consumption, particularly around town.

Annual fuel cost

According to the EPA, the 2017 Ford Flex AWD 3.5L will cost approximately $2,450 per year in fuel. This figure is based on driving 15,000 miles annually, using the national average fuel prices at the time the EPA testing was conducted. Of course, your actual fuel costs will vary depending on your driving habits, local fuel prices, and the specific blend of gasoline you’re using. A heavy right foot or consistent city driving will easily push that number higher.

Real-world expectations

While the official figures provide a baseline, real-world MPG for the 2017 Ford Flex AWD 3.5L tends to hover slightly below the EPA estimates. Expect to see city MPG in the low to mid teens, and highway MPG closer to 20 MPG, especially if you frequently carry passengers or cargo. Many owners report that gentle driving on the highway can creep up to the EPA figure, but achieving it requires constant vigilance and a conscious effort to minimize acceleration. The Flex’s boxy shape also contributes to wind resistance at higher speeds, further impacting fuel economy.

How it compares

The Flex’s fuel efficiency becomes more apparent when compared to its competitors. The 2017 Toyota Highlander AWD, for example, achieves 20 MPG combined with its 3.5L V6. Even the larger and more powerful 2017 Dodge Durango AWD with the 3.6L V6 manages 21 MPG combined. Even going back further, a 2013-2019 Acura MDX SH-AWD gets 21 combined, with similar passenger room and a more luxurious interior. The fact that buyers still choose the Flex despite its shortcomings speaks to its unique styling and spacious interior.

They are willing to trade a few MPG for the Flex’s distinctive character and unmatched cargo capacity when all seats are folded. Compare FLEX MPG across all years to see different drivetrain options.

Tips to maximize efficiency

One of the simplest ways to improve fuel economy in your Flex is to lighten the load. Remove any unnecessary items from the vehicle. Extra weight significantly impacts fuel consumption. The Flex has a large cargo area, resist the urge to fill it with things you don’t need every day.

Gentle acceleration and braking are key to maximizing fuel efficiency in any vehicle, and the Flex is no exception. Avoid aggressive starts and hard braking, instead aiming for smooth and gradual transitions. The Flex is not a sports car, so driving it like one will only hurt your wallet.

Ensure your tires are properly inflated. Underinflated tires increase rolling resistance, which reduces fuel economy. Check your tire pressure regularly and inflate them to the manufacturer’s recommended level. This is important with the Flex’s AWD system, as mismatched tire pressures can also strain the drivetrain.

Consider using cruise control on the highway to maintain a consistent speed and avoid unnecessary acceleration and deceleration. Steady speed minimizes fuel consumption compared to constantly varying your speed. Note that cruise control is less effective in hilly terrain, where the system may aggressively downshift, negating any potential fuel savings. Review all Ford fuel economy data to see how the Flex’s numbers stack up.