The Real Cost
Week of September 21, 2026 · San Diego, CA
2026 Mazda CX-30
13.2 gal tank · 27 MPG
$67–$79
typical fill → full tank · 13.2 galAt $6.00/gal, this tank gets you about 356 miles.
Source: EIA · Updated September 21, 2026
12-week state trend
+$0.83 over 12 wk
Local context
San Diego runs at $6.00/gal this week — about 34.1% above the U.S. average of $4.48. At this price the 2026 Mazda CX-30's 27 MPG returns roughly 4.5 miles per dollar (37.0 gallons per 1,000 miles).
At a typical 12,000 miles a year — the U.S. driving average — a San Diego driver spends about $2,668 on gas in this car (use the calculator for your own mileage). For the same car, $2,668 in California (priciest reporting state at $6.00/gal) vs. $1,746 in Texas ($3.93/gal). $922 swing.
By the numbers
Fill cost
$67–$79
typical → full · 356 mi/tank
Per gallon
$6.00
EIA CA state weekly
Monthly · 12k mi/yr
$222.33
37.0 gal
Annual · 12k mi/yr
$2668
444 gal
The math
Why it costs what it costs.
- Fill cost = 13.2 gal × $6.00/gal = $79.24
- Miles per tank = 13.2 × 27 = 356
- Annual @ 12,000 mi (typical) = 12,000 ÷ 27 × $6.00 = $2668
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