Fuel economy is one of the first things buyers ask about — and for good reason. Whether you’re commuting across the Tri-Cities, making runs out to the Yakima Valley, or hitting the highway for a weekend trip, getting more miles per gallon means more money in your pocket. The good news: the 2026 Buick SUV lineup is impressively efficient across the board. Here’s how each model stacks up, ranked from best to most fuel-thirsty.
FWD vs. AWD: On models where both drivetrains are available, FWD typically delivers slightly better fuel economy than AWD — usually 1–3 MPG combined. If you don’t frequently encounter ice or off-road terrain, FWD can be the more efficient choice. All fuel economy figures below are EPA estimates for 2025 models.
1. Buick Envista — Best Gas Mileage
Subcompact SUV · FWD only
30 MPG Combined28 City / 32 Hwy
The Envista is Buick’s most fuel-efficient SUV and the most affordable entry point in the lineup. It’s FWD only, which actually works in its favor for gas mileage — and makes it a great option for Tri-Cities drivers who do mostly city and highway driving. Sleek, stylish, and easy to park.
🔗 View 2025 Buick Envista on fueleconomy.gov
2. Buick Encore GX — Best Balance of Size & Efficiency
Subcompact SUV · FWD or AWD available
30 MPG Combined (FWD)26 MPG Combined (AWD)29 City / 31 Hwy (FWD)
Tied with the Envista in FWD form, the Encore GX adds the option of AWD for drivers who want a little more traction in winter weather. You’ll give up a few MPG going to AWD, but the Encore GX remains one of the most efficient small SUVs in its class. A great everyday driver for Tri-Cities commuters.
🔗 View 2025 Buick Encore GX on fueleconomy.gov
3. Buick Envision — Best Compact Option
Compact SUV · AWD standard (FWD available on select trims)
26 MPG Combined (FWD)25 MPG Combined (AWD)24 City / 31 Hwy (FWD)
The Envision steps up in size and refinement — more interior space, a quieter ride, and standard AWD on most trims. FWD trims edge it slightly higher in efficiency. It’s the sweet spot for buyers who want a comfortable, capable Buick without moving all the way up to a three-row SUV.
🔗 View 2025 Buick Envision on fueleconomy.gov
4. Buick Enclave — Best for Families
Midsize 3-Row SUV · FWD or AWD available
23 MPG Combined (FWD)21 MPG Combined (AWD)20 City / 27 Hwy (FWD)
The Enclave is Buick’s largest and most powerful SUV — seating up to 7, with up to 97.5 cubic feet of cargo space. Naturally, the bigger engine uses more fuel, but 23 MPG combined for a three-row luxury SUV is genuinely competitive. If you need the space, the Enclave delivers without making you feel guilty at the pump.
🔗 View 2025 Buick Enclave on fueleconomy.gov
No matter which model fits your lifestyle, every Buick SUV in the 2025 lineup balances efficiency with the premium comfort and technology Buick is known for. Stop by our Tri-Cities dealership to compare models in person — or browse our current inventory online. Our team is happy to help you find the right fit.
The information provided is for general informational purposes only and does not constitute legal, financial, or professional advice. While we strive to provide accurate and up-to-date information, we make no guarantees regarding the completeness, accuracy, or reliability of the information presented. Any action you take based on the context of this blog is strictly at your own risk. Always consult a qualified professional or specialist for advice specific to your situation. We are not responsible for any losses or damages arising from the use of this blog or its content.
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