The Real Cost
Week of September 21, 2026 · Portland, OR
2026 Acura MDX
18.5 gal tank · 21 MPG · manufacturer spec
$80–$94
typical fill → full tank · 18.5 galAt $5.11/gal, this tank gets you about 389 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 2026 Acura MDX's 21 MPG returns roughly 4.1 miles per dollar (47.6 gallons per 1,000 miles).
At a typical 12,000 miles a year — the U.S. driving average — a Portland driver spends about $2,918 on gas in this car (use the calculator for your own mileage). For the same car, $3,430 in California (priciest reporting state at $6.00/gal) vs. $2,245 in Texas ($3.93/gal). $1,185 swing.
By the numbers
Fill cost
$80–$94
typical → full · 389 mi/tank
Per gallon
$5.11
EIA West Coast excl. California weekly
Monthly · 12k mi/yr
$243.14
47.6 gal
Annual · 12k mi/yr
$2918
571 gal
The math
Why it costs what it costs.
- Fill cost = 18.5 gal × $5.11/gal = $94.46
- Miles per tank = 18.5 × 21 = 389
- Annual @ 12,000 mi (typical) = 12,000 ÷ 21 × $5.11 = $2918
Want to customize miles per year or override the pump price you saw? Use the full calculator.