The Real Cost
Week of November 2, 2026 · San Antonio, TX
2026 Mazda CX-30
2.5L I4 4WD · 13.2 gal tank · 27 MPG · manufacturer spec
$40–$47
typical fill → full tank · 13.2 galAt $3.58/gal, this tank gets you about 356 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 2026 Mazda CX-30's 27 MPG returns roughly 7.5 miles per dollar (37.0 gallons per 1,000 miles).
At a typical 12,000 miles a year — the U.S. driving average — a San Antonio driver spends about $1,590 on gas in this car (use the calculator for your own mileage). For the same car, $2,555 in California (priciest reporting state at $5.75/gal) vs. $1,590 in Texas ($3.58/gal). $964 swing.
By the numbers
Fill cost
$40–$47
typical → full · 356 mi/tank
Per gallon
$3.58
EIA TX state weekly
Monthly · 12k mi/yr
$132.52
37.0 gal
Annual · 12k mi/yr
$1590
444 gal
The math
Why it costs what it costs.
- Fill cost = 13.2 gal × $3.58/gal = $47.23
- Miles per tank = 13.2 × 27 = 356
- Annual @ 12,000 mi (typical) = 12,000 ÷ 27 × $3.58 = $1590
Want to customize miles per year or override the pump price you saw? Use the full calculator.