The Real Cost
Week of May 18, 2026 · Seattle, WA
2026 Toyota Sienna 2WD
20 gal tank · 36 MPG
$111.82 to fill the tank
At $5.59/gal, this tank gets you about 720 miles.
Source: EIA · Updated May 18, 2026
By the numbers
- Fill cost
- $111.82
- 720 miles per tank
- $/gallon
- $5.59
- EIA WA state weekly
- Monthly (12k mi/yr)
- $155.31
- 27.8 gallons
- Annual (12k mi/yr)
- $1864
- 333 gallons
The math
Why it costs what it costs.
- Fill cost = 20 gal × $5.59/gal = $111.82
- Miles per tank = 20 × 36 = 720
- Annual (12,000 mi) = 12,000 ÷ 36 × $5.59 = $1864
Want to customize miles per year or override the pump price you saw? Use the full calculator.