How big is the gas tank on a 2017 Ford F-150 3.5 EcoBoost?
The standard fuel tank for the 2017 Ford F-150 equipped with the 3.5 EcoBoost is 23 gallons. An optional 36-gallon extended-range tank was available on certain configurations. Exact capacity depends on the cab and bed layout and trim level.
Tank sizes and configuration
Most buyers in 2017 encountered two possible tank sizes for the F-150 with the 3.5 EcoBoost. Here are the sizes you might see in dealer listings or window stickers.
- 23 gallons (approximately 87.3 liters) — standard tank on many 2017 F-150 configurations with the 3.5 EcoBoost.
- 36 gallons (approximately 136 liters) — extended-range tank offered on select configurations, primarily certain crew-cab/long-bed setups and higher trims.
Because Ford offered the extended-range tank as an option across multiple build combinations, the 36-gallon tank isn’t universal. Always verify the tank size on the specific vehicle by checking the original window sticker, the owner's manual, or the VIN details with Ford.
What to know about fuel capacity and range
Beyond the raw capacity, the fuel tank size matters for estimated driving range. The 3.5 EcoBoost combines efficiency with performance, so real-world range depends on driving style, payload, and terrain. Knowing whether your F-150 has the 23- or 36-gallon tank helps estimate how far you can travel between fill-ups.
In summary, the typical 2017 F-150 with the 3.5 EcoBoost uses a 23-gallon tank, while the 36-gallon extended-range option is available on select configurations. Always confirm the exact size for a specific vehicle via official documentation or a VIN lookup.
Conclusion / Summary
Summary: The standard gas tank is 23 gallons; an optional 36-gallon extended-range tank was offered on certain configurations. To know the exact size for a particular truck, check the window sticker, the owner's manual, or perform a VIN-based confirmation with Ford.
