2008 Ford F-150 Gas Tank Size

Depending on the engine, a typical 2008 Ford F-150 has a gas tank size of 26 or 27 gallons, with a few boasting up to 30 and even 35.7 gallons.
Written by Maxine Boyko
Reviewed by Jessica Barrett
Updated on Jul 19, 2022
Your 2008
Ford F-150
fuel tank size is determined by the cab and box configuration. The 2008 model year F-150s usually have a fuel tank capacity of either 26 or 27 gallons—although some special configurations reach up to 30+ gallons.
When the time comes to hit up the pump, you’ll need to know how much gas can go into your tank. This information is typically denoted somewhere in your owner’s manual, but if you lost that, no need to fret!
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How big is the gas tank on a 2008 Ford F-150?

Ford’s fan-favorite truck is equipped with a huskier fuel tank to keep up with demands for larger-than-life lifestyles. We know it’s easy to get caught up in the hype and not realize that these tanks are not one size fits all—that’s why we’re here to get you up to speed on your particular F-150’s fuel tank. 
The 2008 Ford F-150’s gas tank size varies depending on which cab and box configuration you have, as follows: 
  • 4.2-liter V6
  • 4.6-liter V8
  • 5.4-liter V8, also available as an E85 Flex Fuel engine
Regular Cab and Extended Cab pickups generally have a fuel tank capacity of either 26 or 27 gallons—with the exception being the XL and XLT Extended Cab pickups, each boasting a 35.7-gallon capacity fit for supersized enthusiasts.
Crew Cab pickups offer strictly 27- or 30-gallon capacity tanks which vary across all trim levels, including the FX2, FX4, Lariat, King Ranch, and 60th Anniversary edition trucks. The only trim we haven’t yet mentioned that doesn’t come with two different fuel tank capacities is the Limited, which comes solely equipped with a 30-gallon capacity tank.

How to check your 2008 Ford F-150’s gas tank size

There’s always the possibility of getting into a scenario where you need to know your F-150’s gas tank size. Here are a few easy methods for finding out.

Measure the gas tank

Perhaps the most hands-on method is measuring the tank yourself! Grab a measuring tape and calculator (or your mental math skills), then jot down the following tank measurements:
  • Width
  • Length
  • Height
Once you have those measurements, all you have to do is multiply them (LxWxH) and divide that number by 231, which is the conversion from cubic inches to gallons. 

Check your owner’s manual

Perhaps you’ve already thought of this—but if you haven’t, you can always check your owner’s manual. Sometimes it can be tough to know what to search for; seek out keywords like “fuel tank capacity” and related phrases to find your F-150’s specs. 

Drive till empty, then fill it up

We don’t recommend driving until the tank is completely depleted of gas, as that could harm your truck; rather, drive until the fuel gauge signals “E” before refueling. While this method won’t give you an exact measurement, it’s a decent approximation. Try to fuel up soon after you get an empty warning so you don’t forget!
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How to save on fuel costs in a Ford F-150

A 2008 Ford-150 with four-wheel drive and a V8 engine is rated for 14 mpg combined city/highway. The two-wheel drive configuration, however, typically offers either 15 or 16 mpg combined. And if you opt for an E85 model, the two-wheel drive V8 can eke out either a combined 11 mpg or 12 mpg—but the 4WD option drops down to a measly 10 mpg combined.
While the 2008 Ford F-150 does not have great fuel economy, there are still ways to cut down on pump consumption. Check out our handy guide: 
  • Stick to a maintenance schedule. Missing routine upkeep on your truck’s system can tank your fuel economy. 
  • Lighten up on the pedal. Avoiding hard starts and stops will keep your fuel consumption lower and more predictable. Try braking and accelerating more gradually.
  • Keep idling to a minimum. Letting your car run for longer than necessary is a surefire way to burn through lots of fuel. On colder mornings, you can warm up your car by easing into driving, rather than letting it run while parked.

How to optimize your F-150’s insurance coverage

Driving a gas guzzler is tough on the wallet, so it’s especially important to pinch pennies where you can. You can save money on car insurance while also optimizing your coverage with a little help from Jerry. 
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