The Real Cost
Week of May 18, 2026 · Seattle, WA
2026 BMW X5 M Competition
24 gal tank · 15 MPG
$134.18 to fill the tank
At $5.59/gal, this tank gets you about 360 miles.
Source: EIA · Updated May 18, 2026
By the numbers
- Fill cost
- $134.18
- 360 miles per tank
- $/gallon
- $5.59
- EIA WA state weekly
- Monthly (12k mi/yr)
- $372.73
- 66.7 gallons
- Annual (12k mi/yr)
- $4473
- 800 gallons
The math
Why it costs what it costs.
- Fill cost = 24 gal × $5.59/gal = $134.18
- Miles per tank = 24 × 15 = 360
- Annual (12,000 mi) = 12,000 ÷ 15 × $5.59 = $4473
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