The Real Cost
Week of May 18, 2026 · Tulsa, OK
2026 Mazda MX-5
13 gal tank · 29 MPG
$57.19 to fill the tank
At $4.40/gal, this tank gets you about 377 miles.
Source: EIA · Updated May 18, 2026
By the numbers
- Fill cost
- $57.19
- 377 miles per tank
- $/gallon
- $4.40
- EIA Midwest weekly
- Monthly (12k mi/yr)
- $151.69
- 34.5 gallons
- Annual (12k mi/yr)
- $1820
- 414 gallons
The math
Why it costs what it costs.
- Fill cost = 13 gal × $4.40/gal = $57.19
- Miles per tank = 13 × 29 = 377
- Annual (12,000 mi) = 12,000 ÷ 29 × $4.40 = $1820
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