If you're shopping for a mid-size SUV, the gas mileage GMC Acadia models offer is probably one of the biggest questions on your mind right now. Nobody wants to buy a great-looking family hauler only to realize they're basically funding their local gas station's retirement plan. The Acadia has gone through some pretty massive changes lately, especially with the 2024 redesign, and those changes have a direct impact on how often you'll be pulling over to fill up.
For a long time, the Acadia was that "middle child" in the GMC lineup—bigger than the Terrain but not quite the behemoth that the Yukon is. It's always been a popular choice for families who need three rows of seats but don't want to feel like they're driving a literal bus. However, as gas prices fluctuate, the efficiency of these three-row crossovers has become a make-or-break feature for most of us.
The big engine change for 2024
GMC decided to shake things up significantly for the latest generation of the Acadia. In the past, you usually had a choice between a somewhat underpowered four-cylinder and a thirsty but reliable V6. For the newest models, they've ditched the V6 entirely in favor of a 2.5-liter turbocharged four-cylinder engine.
Now, I know what you're thinking—a four-cylinder in a big SUV? It sounds like it might struggle, but this thing actually pumps out more horsepower and torque than the old V6 did. Because it's a turbo, it's designed to be more efficient when you're just cruising, but it gives you that punch when you need to merge onto the highway. The official EPA ratings for the front-wheel-drive version usually hover around 20 mpg in the city and 27 mpg on the highway. If you opt for all-wheel drive, those numbers dip slightly, usually landing around 19 city and 24 highway.
It's a solid improvement over the older generations, but it's still a heavy vehicle. You aren't going to get Prius numbers here, and anyone who tells you otherwise is probably trying to sell you something. But for a vehicle that can carry seven or eight people, it's definitely respectable.
Does all-wheel drive really kill your efficiency?
This is the age-old debate for anyone living in a place where it actually snows. You want the security of AWD, but you don't want to pay for it every single time you hit the gas station. With the Acadia, the penalty for having all four wheels powered isn't as bad as it used to be, but it's definitely there.
The gas mileage GMC Acadia AWD models get is typically about 1 to 3 miles per gallon lower than the FWD versions. While that doesn't sound like a huge gap, it adds up over a year of commuting. Most modern Acadias use a system that can disconnect the rear axle when you don't need it, which helps save a bit of fuel. Still, carrying around the extra weight of the transfer case and driveshaft means the engine has to work a little harder regardless. If you live in a sunny climate and never plan on going off-road, sticking with front-wheel drive is the easiest way to keep your fuel costs down.
What you'll actually see at the pump
We all know that EPA estimates are a bit like the photos on a fast-food menu—they represent the "best-case scenario." In the real world, your gas mileage GMC Acadia numbers are going to depend heavily on how you drive. If you're the type of person who treats every green light like the start of a drag race, you're going to see those numbers tank into the teens pretty quickly.
On the flip side, if you spend most of your time on the interstate with the cruise control set to 70 mph, you might actually be surprised at how efficient the Acadia can be. The new 8-speed and 9-speed transmissions (depending on the year) are geared to keep the RPMs low at cruising speeds. I've talked to owners who managed to hit nearly 30 mpg on long road trips by being gentle with the throttle.
However, "city driving" is where things get tricky. If your daily commute involves a lot of stop-and-go traffic or idling in the school pickup line, that big SUV body takes a lot of energy to get moving again and again. That's where you'll really start to notice the difference between the Acadia and a smaller car.
How the Acadia stacks up against the competition
When you look at the competition—think the Kia Telluride, Honda Pilot, or Ford Explorer—the Acadia holds its own fairly well. Most of these three-row SUVs live in that same 20-25 combined mpg range.
The Kia and Honda still stick with V6 engines for the most part. While those engines feel very smooth, they often struggle to match the highway efficiency of GMC's new turbo-four. The Ford Explorer has a variety of engines, including a hybrid, which can beat the Acadia in raw numbers, but you'll often pay a much higher sticker price for that hybrid tech.
When you're weighing the gas mileage GMC Acadia offers, you have to look at the total cost of ownership. GMC parts are generally easy to find, and the turbocharged engine is becoming a staple across the GM lineup (Chevy, Buick, etc.), which means mechanics know how to work on them. Sometimes saving a few bucks at the pump with a more complex hybrid isn't worth it if the maintenance costs are higher down the road.
Simple ways to keep those fuel costs down
Since we're talking about a larger vehicle, small changes in your driving habits can make a bigger difference than they would in a small sedan. If you're trying to squeeze every last mile out of a tank in your Acadia, here are a few things to keep in mind:
- Check your tires: Seriously, it sounds like "dad advice," but low tire pressure creates more rolling resistance. It can easily cost you 1 or 2 mpg.
- Lose the roof rack: If you aren't actively carrying a kayak or a luggage box, take those crossbars off. They're like little wind sails that ruin your aerodynamics.
- The "Eco" mode is your friend: Most newer Acadias have different drive modes. Using the fuel-sipping mode usually dulls the throttle response, which prevents you from accidentally wasting gas when you pull away from a stop.
- Watch the idle time: The Acadia has a start/stop feature that shuts the engine off at red lights. A lot of people find it annoying and turn it off, but if you leave it on, it really does help in heavy city traffic.
Looking back at older models
If you're shopping the used market, the gas mileage GMC Acadia story changes a bit. The first-generation models (pre-2017) were much bigger and heavier. They almost always had the 3.6-liter V6, and you'd be lucky to see 22 mpg on the highway with those. They were great for space, but they were definitely "gas guzzlers" by modern standards.
Between 2017 and 2023, the Acadia actually shrunk a little bit, which made it more efficient. During those years, you could find the 2.0-liter turbo engine which was quite a little fuel-saver. If you're looking for the absolute best fuel economy in an Acadia without buying a brand-new 2024 or 2025 model, a used 2.0-liter turbo FWD model from around 2021 is probably your best bet.
Is the Acadia right for you?
At the end of the day, the gas mileage GMC Acadia provides is a balance. It's designed for people who need the room but don't want the massive footprint of a full-size truck. You get a decent amount of power, plenty of tech, and fuel economy that won't make you weep every time you look at your bank statement.
It's a comfortable, quiet cruiser that shines on the open road. While it might not be the absolute "king" of fuel efficiency in the SUV world, it's competitive enough that it shouldn't be a dealbreaker for most families. Just remember that the way you drive has a bigger impact than any number on a window sticker. Keep it steady, watch the tire pressure, and the Acadia will treat your wallet just fine.