The Real Cost
Week of September 21, 2026 · Portland, OR
2023 BMW X5
22 gal tank · 15 MPG · manufacturer spec
$95–$112
typical fill → full tank · 22 galAt $5.11/gal, this tank gets you about 330 miles.
Source: EIA · Updated September 21, 2026
12-week state trend · padd proxy
+$0.77 over 12 wk
Local context
Portland runs at $5.11/gal this week — about 14.0% above the U.S. average of $4.48. At this price the 2023 BMW X5's 15 MPG returns roughly 2.9 miles per dollar (66.7 gallons per 1,000 miles).
At a typical 12,000 miles a year — the U.S. driving average — a Portland driver spends about $4,085 on gas in this car (use the calculator for your own mileage). For the same car, $4,802 in California (priciest reporting state at $6.00/gal) vs. $3,143 in Texas ($3.93/gal). $1,659 swing.
By the numbers
Fill cost
$95–$112
typical → full · 330 mi/tank
Per gallon
$5.11
EIA West Coast excl. California weekly
Monthly · 12k mi/yr
$340.40
66.7 gal
Annual · 12k mi/yr
$4085
800 gal
The math
Why it costs what it costs.
- Fill cost = 22 gal × $5.11/gal = $112.33
- Miles per tank = 22 × 15 = 330
- Annual @ 12,000 mi (typical) = 12,000 ÷ 15 × $5.11 = $4085
Want to customize miles per year or override the pump price you saw? Use the full calculator.