The Real Cost
Week of September 21, 2026 · Austin, TX
2026 Cadillac XT5
19 gal tank · 21 MPG
$63–$75
typical fill → full tank · 19 galAt $3.93/gal, this tank gets you about 399 miles.
Source: EIA · Updated September 21, 2026
12-week state trend
+$0.64 over 12 wk
Local context
Austin runs at $3.93/gal this week — about 12.3% below the U.S. average of $4.48. At this price the 2026 Cadillac XT5's 21 MPG returns roughly 5.3 miles per dollar (47.6 gallons per 1,000 miles).
At a typical 12,000 miles a year — the U.S. driving average — a Austin driver spends about $2,245 on gas in this car (use the calculator for your own mileage). For the same car, $3,430 in California (priciest reporting state at $6.00/gal) vs. $2,245 in Texas ($3.93/gal). $1,185 swing.
By the numbers
Fill cost
$63–$75
typical → full · 399 mi/tank
Per gallon
$3.93
EIA TX state weekly
Monthly · 12k mi/yr
$187.10
47.6 gal
Annual · 12k mi/yr
$2245
571 gal
The math
Why it costs what it costs.
- Fill cost = 19 gal × $3.93/gal = $74.65
- Miles per tank = 19 × 21 = 399
- Annual @ 12,000 mi (typical) = 12,000 ÷ 21 × $3.93 = $2245
Want to customize miles per year or override the pump price you saw? Use the full calculator.