The short answer
If you want the best gas mileage in the new Chevy lineup and you're driving in and around San Antonio, the small crossovers win. A front-wheel-drive Trax or Trailblazer lands right around 30 mpg combined. Step up to a compact SUV and you're in the mid-to-upper 20s. Want a three-row? Budget low 20s. Need a full-size Tahoe but hate the pump? The 3.0L Duramax diesel is the sleeper of the whole lineup at roughly 24 mpg combined and close to 28 on the highway, which is genuinely wild for a vehicle that seats eight.
That's the headline. Now here's the part that matters more, because most people shop MPG the wrong way.
Your commute matters more than the sticker number
San Antonio driving is not EPA driving. If your day is US 281 from Stone Oak down to downtown at 7:45 a.m., you're crawling, idling, and running the A/C in traffic. City mpg is your number, not highway. If you're running Loop 1604 out to Sea World and back, or making the I-10 hop to Boerne and Comfort, you'll do better than the combined figure most days.
Ask yourself three quick questions before you shop on mpg alone:
- How many miles a year do you really drive? A 20,000-mile-a-year commuter feels a 5 mpg difference. Someone at 8,000 miles barely notices it.
- City or highway? Turbo four-cylinders and diesels shine on the open road. Stop-and-go eats their advantage.
- Do you actually tow? Because towing a boat to Canyon Lake twice a summer doesn't justify a full-size V8 if you spend the other 360 days alone in a school-drop-off line.
New Chevy MPG comparison, with real fuel costs
Here's how the lineup stacks up. Annual fuel cost assumes 12,000 miles a year at $2.85 a gallon, which is in the neighborhood of what San Antonio drivers have been paying for regular. Adjust up or down for your own mileage.
| Model | Drivetrain | EPA City / Hwy / Combined | Est. Annual Fuel Cost |
|---|---|---|---|
| Chevy Trax | 1.2L turbo, FWD | 28 / 32 / 30 | ~$1,140 |
| Chevy Trailblazer | 1.2L turbo, FWD | 28 / 31 / 29 | ~$1,180 |
| Chevy Equinox | 1.5L turbo, FWD | 24 / 30 / 26 | ~$1,315 |
| Chevy Colorado | 2.7L turbo, 2WD | 20 / 25 / 22 | ~$1,555 |
| Chevy Traverse | 2.5L turbo, FWD | 20 / 27 / 23 | ~$1,485 |
| Chevy Tahoe | 3.0L Duramax diesel, 2WD | 21 / 28 / 24 | ~$1,425 |
| Chevy Tahoe | 5.3L V8, 2WD | 16 / 20 / 17 | ~$2,010 |
Figures are EPA estimates and vary by model year, trim and equipment. Always check the window sticker on the exact vehicle, and if you're not sure how to read one, our team will walk you through every line of it.
Model by model: who should buy what
Trailblazer: the cheapest tank of gas in the lineup
The Trailblazer is the one I point people toward when the commute is long and the budget is tight. That 1.2L turbo three-cylinder sounds small until you realize it's moving a light vehicle and sipping fuel doing it. Around 29 mpg combined means you're filling up maybe twice a month on a normal commute. It still gives you a real cargo area, available all-wheel drive, and the ACTIV and RS trims look sharp enough that nobody thinks you bought the economy option. Downside? It's not a tower and it's not a road-trip cruiser for five adults.
Equinox: the sweet spot for most San Antonio families
Most people who walk in asking about fuel economy end up in an Equinox. The 1.5L turbo gets around 30 mpg on the highway, so an Austin run up I-35 costs you a few gallons, not a fortune. You get back seat space that actual humans fit in, a big center screen with Google built in, and Chevy Safety Assist standard. Add all-wheel drive and you'll give up about a mile or two per gallon. In Texas, that's a comfort and resale decision more than a traction one.
Traverse: three rows without three-row fuel bills
Here's the one that surprises people. The Traverse dropped the V6 for a 2.5L turbo, and it still tows up to 5,000 pounds properly equipped while returning around 27 mpg on the highway. Compare that to a full-size SUV and you're saving several hundred dollars a year while carrying eight people. If your family needs the third row for carpool duty and Friday night games, but you don't tow heavy, this is the smart buy.
Colorado: a truck that doesn't punish you daily
Midsize trucks make sense in this city. Parking garages downtown, tight lots on the St. Mary's Strip, but you still need a bed for mulch and dump runs. The Colorado runs one engine now, a 2.7L turbo, and in 2WD it's good for about 25 mpg highway while pulling up to 7,700 pounds in the right configuration. Go Z71 or Trail Boss with 4WD and mpg drops a bit. That's the trade for going off-pavement out past Bandera.
Tahoe: get the diesel
I'll say it plainly. If you're buying a Tahoe and fuel cost is anywhere on your list, drive the 3.0L Duramax before you sign for a V8. Roughly 28 mpg highway in a vehicle this size means San Antonio to Dallas on one tank with room left over. Torque comes on low, which is exactly what you want merging onto I-10 with a full load. The V8 is still the answer if you tow near the max or want the sound. But the diesel saves a real 500 to 600 bucks a year at average mileage, and more if you drive a lot.
What about going electric or hybrid?
The Equinox EV changes the math entirely. Charging overnight at home in San Antonio typically works out to the equivalent of well under two dollars a gallon, and there's no oil change on the calendar. If you have a garage outlet and a predictable commute, run the numbers. If you road-trip constantly to places with thin charging coverage, gas may still fit your life better. We're happy to have that conversation honestly, either direction.
Five things that quietly cost you MPG in Texas
- Tire pressure. Heat swings between a 45-degree January morning and a July afternoon move your pressures more than you'd think. Low tires cost real fuel.
- Idling with the A/C blasting. Ten minutes in a school pickup line, every day, adds up over a year.
- Roof cargo boxes left on year-round. Take it off after the trip.
- Skipping air filter changes. Cedar pollen and caliche dust are not kind to filters here.
- Aggressive throttle on 1604. Steady speed beats sprint-and-brake every time.
Common questions we get on the lot
Which new Chevy SUV gets the best gas mileage?
Trax and Trailblazer in front-wheel drive, both right around 30 mpg combined. Among compact SUVs with more room, the Equinox leads at roughly 26 combined and 30 highway.
Does all-wheel drive hurt fuel economy?
Yes, usually by one to two mpg. In this climate you don't need it for snow, so buy it for confidence in heavy rain, caliche roads and resale, not because you think you must have it.
Is a diesel worth it in San Antonio?
If you drive more than about 15,000 miles a year, or you tow regularly, the Duramax Tahoe pays for itself over a typical ownership period. Under that, it's a comfort and range preference.
Come do the math with us
Bring your real numbers. Miles per week, where you drive, what you tow, what you're paying now. We'll put you in two or three vehicles back to back, run the fuel cost side by side, and let the spreadsheet decide instead of the brochure. Browse the new Chevrolet inventory at Valmark Chevy online, then call or stop in and schedule a test drive. Ask for the fuel economy comparison. We do it every day, and it takes about ten minutes.