The Real Cost
Week of November 2, 2026 · San Antonio, TX
2027 GMC Acadia
2.5L I4 AWD · 21.7 gal tank · 21 MPG · manufacturer spec
$66–$78
typical fill → full tank · 21.7 galAt $3.58/gal, this tank gets you about 456 miles.
Source: EIA · Updated November 2, 2026
12-week state trend
+$0.06 over 12 wk
Local context
San Antonio runs at $3.58/gal this week — about 13.8% below the U.S. average of $4.15. At this price the 2027 GMC Acadia's 21 MPG returns roughly 5.9 miles per dollar (47.6 gallons per 1,000 miles).
At a typical 12,000 miles a year — the U.S. driving average — a San Antonio driver spends about $2,045 on gas in this car (use the calculator for your own mileage). For the same car, $3,285 in California (priciest reporting state at $5.75/gal) vs. $2,045 in Texas ($3.58/gal). $1,240 swing.
By the numbers
Fill cost
$66–$78
typical → full · 456 mi/tank
Per gallon
$3.58
EIA TX state weekly
Monthly · 12k mi/yr
$170.38
47.6 gal
Annual · 12k mi/yr
$2045
571 gal
The math
Why it costs what it costs.
- Fill cost = 21.7 gal × $3.58/gal = $77.64
- Miles per tank = 21.7 × 21 = 456
- Annual @ 12,000 mi (typical) = 12,000 ÷ 21 × $3.58 = $2045
Want to customize miles per year or override the pump price you saw? Use the full calculator.