⛽ Run Details
Total Fuel Cost for This Run
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Gallons Needed
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Cost Per Mile
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DEF Cost
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Idle Fuel Cost
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2026 Fuel Cost Benchmarks for Owner-Operators
At the 2026 national average diesel price of $3.80-$4.20/gallon, most Class 8 semi trucks burn through $0.58-$0.65 per loaded mile in fuel. At 100,000 miles per year, that's $58,000-$65,000 in annual fuel expense — typically the single largest variable cost in an owner-operator's operation.
Every 0.5 MPG improvement at $4.00/gallon saves approximately $0.10 per mile. At 100,000 annual miles, that's $10,000 in annual savings. Three levers you control: tire pressure (1 PSI low = 0.4% fuel loss), idle time (1 hour idle ≈ 0.8 gallons), and speed (each 1 mph over 60 increases fuel use ~0.14 MPG).
Always check the DOE/EIA weekly diesel price before entering a price — regional prices can vary by $0.30-0.50/gallon from the national average.