If you're asking are 4runners good on gas, the short answer is a pretty definitive "no," but that hasn't stopped people from buying them in droves for decades. It's one of those things where you know what you're getting into before you sign the papers. You don't buy a 4Runner to save money at the pump; you buy it because you want a vehicle that will probably outlast most of the relationships in your life.
Still, it's worth looking at the "why" behind the numbers. Most owners will tell you they get somewhere between 16 and 19 miles per gallon on a good day. If you've got a heavy foot or you've bolted a bunch of heavy gear to the roof, those numbers can easily dip into the low teens. Let's break down why this legendary SUV is so thirsty and whether that should actually stop you from putting one in your driveway.
The reality of the 4.0-liter V6 engine
The heart of the current 5th-generation 4Runner is a 4.0-liter V6 engine that feels like a relic from a different era. Because, honestly, it kind of is. Toyota has been using this basic engine design for a long, long time. It's famous for being "bulletproof," but that reliability comes at a cost. It's not a high-tech, turbocharged, fuel-sipping masterpiece. It's a workhorse designed to keep chugging through mud, sand, and snow without overheating or breaking down.
The biggest issue isn't just the engine size, though. It's the fact that it's paired with a five-speed automatic transmission. In a world where most modern SUVs have eight, nine, or even ten speeds, the 4Runner's five-speed feels a bit like bringing a knife to a gunfight. Since there aren't many gears to choose from, the engine has to work harder and rev higher to stay in its power band, especially when you're merging onto the highway or trying to pass someone. That constant high-revving is a major reason why are 4runners good on gas is usually answered with a laugh by current owners.
Aerodynamics of a kitchen appliance
Let's be real: the 4Runner has the aerodynamic profile of a refrigerator. It's a big, boxy, upright SUV with a flat front end that has to push a massive amount of air out of its way just to move forward. The faster you go, the harder the wind pushes back. If you're cruising at 80 mph on the interstate, your fuel economy is going to plummet because that V6 is fighting a losing battle against wind resistance.
Most vehicles designed for fuel efficiency have sleek, sloping lines and active shutters in the grille to help them slice through the air. The 4Runner doesn't care about any of that. It's built for ground clearance and approach angles, which means it sits high off the ground. While that's great for going over rocks, it's terrible for fuel economy because air gets trapped underneath the vehicle, creating a ton of drag.
The "Overlander" tax on fuel economy
One of the best things about owning a 4Runner is the aftermarket support. You can change almost anything on these trucks. However, if you're wondering are 4runners good on gas after you've added a three-inch lift and 33-inch all-terrain tires, the answer goes from "bad" to "worse."
Every modification you make usually adds weight or increases drag. * Heavy Tires: Switching from stock highway tires to heavy-duty off-road tires increases rolling resistance. Your engine has to work significantly harder just to get those heavy chunks of rubber spinning. * Roof Racks: A full-length steel roof rack looks cool, but it acts like a giant sail. Even without anything strapped to it, a rack can shave 1 or 2 MPG off your average. * Steel Bumpers and Winches: Adding weight to the front and back makes the truck much heavier than it was when it left the factory. More weight equals more fuel consumed every time you pull away from a stoplight.
City driving vs. highway cruising
In the city, the 4Runner is a bit of a pig. Stop-and-go traffic is where this SUV struggles the most. Because it's a heavy, body-on-frame vehicle, it takes a lot of energy to get it moving from a dead stop. If your daily commute involves a lot of traffic lights and short trips, don't be surprised if your dashboard tells you you're getting 14 or 15 MPG.
On the highway, things get slightly better, but only if you keep your speed in check. If you can manage to stay around 65 mph, you might actually see 20 MPG. But as soon as you start pushing 75 or 80, you'll watch the fuel needle move in real-time. It's a vehicle that rewards patient drivers. If you're the type who likes to weave through traffic and accelerate hard, your wallet is going to feel it at the end of the week.
Comparing it to the competition
When you look at the 4Runner's rivals, it doesn't look quite as bad, but it's still trailing the pack. A Jeep Wrangler with a turbo four-cylinder or the EcoDiesel engine will definitely get better mileage. The Ford Bronco, with its more modern 10-speed transmission and EcoBoost engines, generally edges out the 4Runner in efficiency, too.
However, many people choose the 4Runner anyway because they trust its simplicity. A lot of those more "efficient" rivals use complex turbochargers and complicated electronics to get those higher MPG numbers. 4Runner owners often feel that the extra money spent on gas is essentially a "reliability tax." They'd rather spend $20 more a week on fuel than $3,000 on a turbo replacement five years down the road.
Can you actually improve the MPG?
If you already own one and you're frustrated, there are a few things you can do, though don't expect miracles. First, check your tire pressure. Running tires even a few pounds under the recommended PSI can drag down your mileage. Second, try to keep your roof clear. If you only use your cargo box for camping trips once a month, take it off when you're just driving to work.
The biggest factor, though, is your right foot. The 4Runner responds really well to "grandma-style" driving. If you accelerate slowly and coast toward red lights, you can definitely squeeze a few more miles out of every tank. Some people also swear by high-flow air filters or certain exhaust systems, but in most cases, the gains are so small you'd never actually notice them at the pump.
Is the 2025 hybrid the answer?
We're finally seeing a new generation of 4Runner on the horizon, and it's bringing a hybrid powertrain into the mix. This is a huge deal for people who love the platform but hate the fuel costs. By using a turbocharged 2.4-liter engine paired with an electric motor, Toyota is aiming to give drivers way more torque while finally addressing the elephant in the room: fuel economy.
Will the new one be "good" on gas? Compared to the old V6, almost certainly. But it's still a heavy, boxy SUV meant for the dirt, so it's never going to compete with a RAV4 Hybrid. It's a step in the right direction, but for many purists, the old, thirsty V6 will always be the gold standard for reliability.
The final verdict
So, are 4runners good on gas? No, they really aren't. If fuel economy is your top priority, you're looking at the wrong vehicle. You'd be much happier in a Highlander or even a Subaru Outback.
But people don't buy 4Runners for the MPG. They buy them because they can take a beating, they hold their value incredibly well, and they can go just about anywhere. When you're out on a trail in the middle of nowhere, you aren't thinking about your miles per gallon; you're thinking about the fact that your truck is definitely going to get you back home. For a lot of us, that peace of mind is worth every extra gallon of gas.