The Real Cost
Week of May 18, 2026 · Austin, TX
2026 Mazda 3 4-Door 2WD
13 gal tank · 30 MPG
$50.54 to fill the tank
At $3.89/gal, this tank gets you about 390 miles.
Source: EIA · Updated May 18, 2026
By the numbers
- Fill cost
- $50.54
- 390 miles per tank
- $/gallon
- $3.89
- EIA TX state weekly
- Monthly (12k mi/yr)
- $129.60
- 33.3 gallons
- Annual (12k mi/yr)
- $1555
- 400 gallons
The math
Why it costs what it costs.
- Fill cost = 13 gal × $3.89/gal = $50.54
- Miles per tank = 13 × 30 = 390
- Annual (12,000 mi) = 12,000 ÷ 30 × $3.89 = $1555
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