The 2018 Ford Flex FWD with its 3.5L V6 engine gets 19 MPG combined. Nobody buys a Flex expecting Prius-like fuel efficiency. This is a boxy, practical family hauler that prioritizes space and quirky style over less gas. The Flex buyer has accepted this tradeoff in exchange for its unique qualities.

City and highway performance

The EPA estimates the 2018 Ford Flex FWD at 16 MPG in the city and 23 MPG on the highway. The city figure reflects the engine working harder in stop-and-go traffic, and the vehicle’s weight. Out on the open road, the 23 MPG figure is more attainable, especially at consistent speeds. However, the Flex’s boxy shape creates aerodynamic drag, meaning that efficiency drops off noticeably at higher speeds. Aggressive acceleration will significantly hurt that 16 MPG city number.

Annual fuel cost

According to the EPA, the estimated annual fuel cost for the 2018 Ford Flex FWD is $2,300. This figure is based on driving 15,000 miles per year and using national average fuel prices. Your actual fuel costs may vary depending on your driving habits, local fuel prices, and the type of fuel you use. The EPA doesn’t specify a recommended octane rating, and using a higher octane fuel than necessary won’t improve fuel economy and will only increase your expenses.

Real-world expectations

The EPA provides a standardized testing methodology, but real-world driving often yields different results. Weather conditions (wind resistance has a big impact on the Flex), terrain (hills will hurt the fuel economy), and driving style can all influence your MPG. Careful and consistent driving is essential to attain the EPA estimates above.

How it compares

The 2018 Ford Flex’s fuel economy lands somewhere in the middle of the pack compared to other three-row SUVs and crossovers. For instance, the 2018 Toyota Highlander LE FWD achieves 22 MPG combined, making it a more fuel-efficient choice than the Flex. The Honda Pilot LX FWD boasts 23 MPG combined. The 2018 Chevrolet Traverse LS FWD, despite being redesigned for that model year and claiming improved economy, gets a combined 20 MPG. This comparison emphasizes that the Flex buyer isn’t primarily focused on fuel economy. They’re choosing the Flex for its distinctive style, spacious interior, and available features, even if it means sacrificing a few miles per gallon. Review all Ford fuel economy data to understand where the Flex ranks across the entire Ford lineup. Compare FLEX MPG across all years using our model lookup.

Tips to maximize efficiency

Avoid aggressive acceleration. The Flex’s V6, while adequate, responds poorly to heavy throttle inputs. Gentle acceleration allows the engine to operate more efficiently and reduces fuel consumption, especially in city driving.

Maintain proper tire inflation. Underinflated tires create more rolling resistance, which reduces fuel economy. Check your tire pressure regularly and inflate them to the recommended pressure listed on the driver’s side doorjamb.

Reduce excess weight. Carrying unnecessary items in your car adds weight, which forces the engine to work harder and consume more fuel. Remove any items you don’t need from the cargo area and passenger compartment.

Plan your trips efficiently. Combining errands into a single trip can help you avoid multiple cold starts, which consume more fuel. Plan your route in advance to minimize stop-and-go traffic and maximize highway driving opportunities.

Pay attention to your speed. The Flex’s aerodynamics are not its strong point, and fuel economy drops off sharply at higher speeds. Maintaining a consistent speed within the posted speed limit can significantly improve your fuel consumption on the highway.