How Can I Improve Gas Mileage In My Ford F-150?

By Nick Marchenko, PhD

Updated: September 12, 2023

Why on Earth is your Ford F-150 guzzling like there's no tomorrow? While the world has been buzzing with electric and hybrid wonders, some still have a soft spot for good old gasoline or diesel engines, especially when it's the heart of a Ford F-150. Maybe it's the nostalgia or the sheer reliability of it.

However, every Ford F-150 owner has, at some point, looked at the fuel gauge and wondered, "Why?!" Whether it's the unpredictable weather or that sneaky squeak under the bonnet, something's making your beast thirstier than usual.

Let's be clear. Most of us want three things: More miles per tank, less frequent pit stops at the petrol station, and an extended road trip without a tanker tailing us. So, let's explore how we can boost that mileage, shall we?

What follows is a compilation of reasons your F-150 might be drinking more than you'd like and how to give it a bit of a diet.

Key Takeaways:

• Diesel engines are inherently more frugal, consuming 20-30% less than their petrol siblings. Density and efficiency, that's diesel for you!
• If you want the F-150 to be gentle on your wallet, stick to the recommended speeds, engage that cruise control, and oh, that ECO-Mode isn't just a fancy button - use it!
• A well-maintained F-150 is like a disciplined athlete. So, ensure spark plugs, filters, oil, and engine parts are in top form.
• Modern F-150s come loaded with sensors. They're not there for fun; they'll tell you if something's off and causing your fuel to vanish.

Which F-150 Engine is the Frugalest of Them All?

There's a lot that affects the fuel consumption of the F-150. Engine structure, cylinders, valves - the list goes on. While many believe big engines are always thirsty, it's not the entire truth.

Small engines, with their limited capacity, do have their moments of frugality. But, the big boys, with all their power, can also surprise you. When an engine doesn't have to strain, it uses less fuel. It's like asking a weightlifter to open a jar of pickles - effortless.

So, don't be quick to judge the bigger F-150 engines. Given the right conditions, they can be just as economical, if not more.

Now, Diesel or Petrol: Which One's the Sipper?

When we talk fuel consumption, diesels have the upper hand, guzzling 20-30% less than petrol. They also have a knack for pulling heavier loads thanks to their torquey nature.

However, if you fancy a bit of speed and zest, petrol engines in the F-150 have that oomph and agility. But diesels, they have that raw, unadulterated power and efficiency. The density of diesel, for instance, means it releases more energy than petrol. Diesel can burn in almost any air ratio, making it incredibly efficient at idle, almost 2–3 times compared to petrol!

So, it boils down to your priorities:

• For spirited drives and light footprints, a petrol Ford F-150 is your companion.
• If it's long hauls, torque, and efficiency you're after, the diesel F-150 should be in your garage.

How on Earth can you improve the Ford F-150's fuel mileage?

Now, achieving a miserly fuel consumption with your F-150 isn't just about sticking a feather in its tailpipe. No. There's a lot that goes into it, and while these methods may sound generic, you'd be surprised at the difference they make on your beloved Ford.

Speeding is fun, but...

If you're tearing up the road like it's the last lap of the Grand Prix, don't come whinging to me about fuel consumption. High speeds mean more petrol guzzled. But trundling along at a snail's pace won't help either.

Each F-150 has a sweet spot - a "cruising speed", if you will. Hit that, and you'll be sipping fuel rather than gulping it. Look at the dashboard, and you might just find this magical number staring right back at you.

Let the truck do the thinking with Cruise Control

On a long, straight road with your F-150? Engage that cruise control. It'll manage the fuel for you, ensuring a smooth journey and perhaps saving a few pennies along the way.

Give ECO-Mode a go

Modern F-150s come with an 'eco mode', and it isn't just for show. Switch it on, and watch as your truck becomes a beacon of fuel efficiency and Mother Nature's new best friend.

Accelerate like you have some sense

Foot hard down and the F-150 will gulp fuel like it's the last drink at the pub. Gentle with the gas pedal, there's no rush. Picture a glass of wine on the dashboard and drive so it doesn't spill a drop.

Idling? More like wasting!

Your F-150, even at a standstill, loves its fuel. Remember, every idle minute is a few pennies down the drain. So if you're parked up waiting for...whatever it is you're waiting for, kill the engine.

Turn it off at red lights? Not so fast...

There's this fairy tale that says killing the engine at every red light saves fuel. Poppycock! Starting up again can use more fuel than a short idle. Plus, you're wearing out the starter.

But, if you're stuck for an age, like longer than a decent rock ballad, perhaps it's best to turn it off. Otherwise, let it run. After all, it's an F-150; it knows what it's doing.

De-clutter that Ford F-150 of yours!

Now, I know the F-150 is a powerhouse, and there’s that irresistible urge to throw everything you own in the back. But here's a thought, on your daily rounds, why haul around a bunch of junk? Those bags, tools, and assorted "I-might-need-this-one-day" items? They're just weighing you down and guzzling your fuel.

So, go on, give it a clean sweep. Lighten the load and watch as your F-150 becomes even more of a fuel-efficient marvel than it already is.

It’s all about the air... in your tyres!

Now, why would anyone neglect these round wonders? A tad deflated tyre can surprisingly play havoc with your fuel efficiency. Less air equals more friction. It’s science! So, don't let your tyres go floppy; otherwise, that fuel gauge will drop faster than you can say "speed bump".

The AC dance

Your F-150's AC doesn't run on hopes and dreams; it nibbles on your fuel. I'm not saying to ditch it altogether - I wouldn’t dare deny you that sweet, cold breeze on a scorching day. But maybe, just occasionally, give it a break when you don't need it. Give it a rest and enjoy some natural, window-down, wind-in-your-hair action.

Power hungry? Turn ‘em off!

This isn't so much of a tip as it is common sense. If you're desperately scanning for the next fuel station, might be a good idea to turn off those non-essentials. But remember, safety first. Don't go gallivanting in the dark without headlights just to save a splash of petrol.

Keep that F-150 purring!

Want your Ford F-150 running smoother than a jazz tune? Keep it in top nick. Here are a couple of things you might want to check:

Those sparky spark plugs

If your spark plugs have thrown in the towel, it's not going to do wonders for your fuel efficiency. A weak or no spark means the fuel isn't igniting properly. And guess what that means? Yep, more fuel down the drain.

Filters, not just for your coffee

Dirty filters are like trying to drink a thick milkshake through a tiny straw. The engine has to work harder, and your fuel efficiency goes out the window. So, keep ‘em clean!

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Lubricate with the golden liquid

Oil isn't just for frying chips. A well-lubricated engine runs like a dream, which means less wasted fuel. It's a win-win.

The Engine's Guts and Glory

Engines, like the rest of us, get old and tired. It's a sad fact of life. With age, they lose some of their vigor. Their once sprightly parts start to flag, they grumble more, and, unfortunately, they start to guzzle more of that precious liquid gold we call fuel.

Should you find your Ford F-150 suddenly having an insatiable thirst for fuel, and you've followed all the top tips from this riveting read, perhaps the old beast's engine parts are showing their age. Things to watch out for include:

• Cylinder-piston group antics. Pesky issues in the cylinders, burned pistons, or uninvited deposits in the combustion chamber. They're all party poopers for your engine, making it gulp down more fuel like it's going out of fashion.
• Fussy valves. Their main gripe? They lose their snugness. When there's a gap between the valve and its seat, it invites more fuel than needed into the combustion chambers. This doesn't give you more power, but instead leads to potential leaks and an unsettling grinding soundtrack.
• Root liners' tantrums and crankshaft capers. A well-behaved crankshaft in your F-150 shouldn't be shuffling about. If it starts to shimmy from side to side, you're looking at energy wastage and heightened fuel consumption.

A Bit Too Much of the Good Stuff?

The beautiful ballet of fuel and air. It's the duo that sets the stage for your engine's performance. They need to be in perfect harmony. Too much fuel? That's a rich mixture, which, while sounding luxurious, isn't splendid for your F-150.

Signs you're running rich? An engine that sounds like it's had one too many, an increased thirst for fuel, and billowing black clouds from the exhaust. Blame might lie with a misbehaving pump, an overly creative ECU, or injectors that have decided to go rogue.

Is your F-150 Trying to Tell You Something?

Modern F-150s are like those friends who simply won't stop talking, thanks to a plethora of sensors. They'll blabber on about any issues if you'd only look at their dashboard. Warning lights flashing? Check engine light nagging?

Why not have a chat with your truck using the OBD-2 gizmo. If your truck's complaining about something, it might just be due to a sensor that's gotten its wires crossed, causing your F-150 to mix its fuel cocktail all wrong.

Teach an Old F-150 New Tricks

In this day and age, trucks come with a brain. But, and here's the fun part, you can outsmart it! Get yourself a programmer, a nifty device that plugs into the OBD-2 connector, and makes you the puppet master of your F-150's brain.

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Link this wizardry to your smartphone, twiddle with some settings, and voilà! You can adjust how thirsty your F-150 gets. Mind you, less power might mean fewer thrilling drives down the motorway.

The Grand Finale

Boosting your F-150's mileage isn't rocket science. Sometimes it's just about keeping the old girl in tip-top shape, or giving her the attention she so richly deserves. After all, she's been loyal to you, hasn't she?