The Real Cost
Week of May 18, 2026 · Arlington, TX
2026 Mercedes-Benz GLC300
14 gal tank · 27 MPG
$54.43 to fill the tank
At $3.89/gal, this tank gets you about 378 miles.
Source: EIA · Updated May 18, 2026
By the numbers
- Fill cost
- $54.43
- 378 miles per tank
- $/gallon
- $3.89
- EIA TX state weekly
- Monthly (12k mi/yr)
- $144.00
- 37.0 gallons
- Annual (12k mi/yr)
- $1728
- 444 gallons
The math
Why it costs what it costs.
- Fill cost = 14 gal × $3.89/gal = $54.43
- Miles per tank = 14 × 27 = 378
- Annual (12,000 mi) = 12,000 ÷ 27 × $3.89 = $1728
Want to customize miles per year or override the pump price you saw? Use the full calculator.