Ask ten shoppers on our lot what matters most and fuel economy lands in the top three almost every time. It makes sense out here. A round trip from Bastrop to downtown Austin on Highway 71 runs about 60 miles. Add a Costco stop in Cedar Park or a job site off 290 in Elgin and you're clearing 300 miles a week without trying.
So which new Chevy actually saves you the most at the pump? Short answer: the 2026 Trax and Trailblazer lead the gas lineup at roughly 30 to 31 MPG combined, while the Silverado 1500 Duramax diesel is the mileage champ among the trucks at about 26 MPG combined. But the honest answer depends on how many miles you drive and what you're hauling. Let's break it down with real numbers.
2026 Chevy MPG Comparison and Estimated Yearly Fuel Cost
Below are EPA-estimated combined figures for common 2026 configurations, plus a rough annual fuel bill based on 15,000 miles a year at $2.85 per gallon for regular and $3.30 for diesel. Central Texas gas prices bounce around, so treat these as a ballpark, not a quote. Always check the window sticker on the specific vehicle you're looking at, since drivetrain and trim change the numbers.
| Model (typical config) | EPA-est. combined MPG | Est. fuel cost / 15,000 mi |
|---|---|---|
| Trax 1.2L turbo, FWD | 30 | $1,425 |
| Trailblazer 1.3L turbo, FWD | 31 | $1,380 |
| Equinox 1.5L turbo, FWD | 28 | $1,525 |
| Blazer 2.0L turbo, FWD | 25 | $1,710 |
| Traverse 2.5L turbo, FWD | 23 | $1,860 |
| Colorado 2.7L turbo, 2WD | 22 | $1,945 |
| Silverado 1500 2.7L TurboMax, 2WD | 20 | $2,140 |
| Silverado 1500 3.0L Duramax diesel, 2WD | 26 | $1,905 |
| Tahoe / Suburban 5.3L V8, 2WD | 18 | $2,375 |
| Tahoe / Suburban 3.0L Duramax diesel, 2WD | 24 | $2,065 |
| Equinox EV (electric) | ~100+ MPGe | $550 to $650 in home charging |
Notice the gap between the top and bottom of that list. It's about $950 a year between a Trailblazer and a V8 Suburban. Real money, but not life-changing money, and that's the point people miss. Don't buy a subcompact if you actually need three rows.
The Fuel Sipper: 2026 Chevy Trax
The Trax is the cheapest new Chevy to feed, full stop. A 1.2-liter turbocharged three-cylinder paired with a six-speed automatic returns around 28 city and 32 highway. On a steady 70 mph cruise down 71 toward Austin, plenty of owners tell us they see better than the sticker.
What surprises people is the size. This isn't a penalty box. Trax stretches over 178 inches long with about 25 cubic feet behind the back seat, and every trim gets an 11-inch infotainment screen. LT and ACTIV add heated seats and better wheels. If your driving is mostly commuting, school runs and the occasional weekend trip to Buc-ee's, this is the smart money.
Best Fuel Economy in a Truck: Silverado and Colorado
Here's the one that shocks longtime truck owners. The 3.0-liter Duramax inline-six in the Silverado 1500 is rated around 24 city and 29 highway in two-wheel drive. That's better than a lot of midsize crossovers. It also makes 495 lb-ft of torque and tows up to roughly 13,000 pounds when properly equipped. You are paying more upfront for the diesel and more per gallon at the pump, but if you're running 20,000 miles a year between Bastrop, Smithville and job sites in San Marcos, the math starts working in your favor around year three.
The 2.7L TurboMax four-cylinder is the volume engine, and it's a genuinely good one at 310 horsepower and 430 lb-ft. Roughly 19 city and 22 highway in 2WD. The 5.3L and 6.2L V8s trade a few MPG for sound and towing headroom.
Prefer something that parks easier? The Colorado uses a single 2.7-liter turbo four across the lineup, tuned three different ways depending on trim, and lands near 20 city and 25 highway in 2WD. It still tows 7,700 pounds properly equipped. For a lot of folks around Cedar Creek pulling a bass boat or a single-axle utility trailer, that's plenty of truck.
Big Family, Better Mileage: The Suburban Diesel
People assume a full-size SUV is a fuel disaster. Not necessarily. Order a Suburban with the 3.0L Duramax and you're looking at about 21 city and 27 highway in two-wheel drive, which is legitimately better than some three-row crossovers. You get 144.7 cubic feet of max cargo space, seating for up to nine and up to 8,200 pounds of towing on the right configuration.
Compare that to the 5.3L V8, which runs closer to 16 city and 20 highway. Over 15,000 miles, the diesel saves roughly $300 a year and cuts the number of fuel stops on a drive to Colorado or the coast almost in half. Long-range tank, quiet cruise, strong torque. It's the road trip pick.
Common Questions from Bastrop Shoppers
What is the most fuel efficient Chevy SUV?
Among gas models, the Trailblazer at roughly 31 MPG combined edges out the Trax. If you count electric, the Equinox EV goes considerably further on a dollar, with an EPA-estimated range up to 319 miles on front-wheel-drive trims and home charging costs that typically run under $700 a year.
Does a Chevy get worse mileage in Texas heat?
A little, yes. Running the A/C hard in August can shave 5 to 10 percent off your real-world MPG, and low tire pressure from temperature swings makes it worse. Keep tires at the door-jamb spec and change the engine air filter on schedule. Cedar pollen season is rough on filters here.
Is the diesel worth the extra cost?
If you drive more than about 18,000 miles a year or tow regularly, usually yes. If you drive 9,000 miles a year to church and the grocery store, no. Buy the engine that matches your actual week.
Do turbo engines need premium fuel?
Most of the Chevy turbo four-cylinders, including those in Trax, Trailblazer, Equinox and the Silverado TurboMax, run on regular 87 octane. The 6.2L V8 is the one that asks for premium.
How to Pick Without Overthinking It
Write down your weekly mileage. Multiply by 52. Then look at the table above and see what a 5 MPG difference actually costs you over a year. For most Bastrop County drivers it's the price of a couple of tanks, which means the right choice usually comes down to seats, bed length and towing, not decimal points on a sticker.
Want to compare specs side by side before you drive out? Our Model Research pages lay out engines, trims and capacities for the whole lineup so you can narrow things down from the couch.
When you're ready, come see us at Covert Chevy Bastrop. Bring your trade, bring your questions and bring your trailer if you want to test tow. We'll put you behind the wheel of two or three options back to back on Highway 71 so you can feel the difference yourself. Call our sales team or check current new inventory at covertbastrop.com, and let's find the Chevy that fits your driving, not somebody else's.